A jar contains 30 red marbles, 50 blue marbles and 20 white marbles. you pick one marble from the jar at random. find the probability of selecting a marble that is not blue

Answers

Answer 1

Answer:

50/100 or 1/2 or 50%

Step-by-step explanation:

total =  30 + 20 + 50 = 100

the probability of choosing a marble that is not blue is equal to the total minus all marbles that are blue therefore 100-30-20=50 therefore the probability is 50/100 or 1/2 or 50%


Related Questions

1

At the beginning of the passage, what is Makayla getting ready to do?

A

open Christmas presents



go trick-or-treating on Halloween

go on an Easter egg hunt

eat Thanksgiving dinner

2 Throughout the story, Makayla remembers information Mrs. Narula taught in

class. What does this information describe?

Answers

a) The passage is a piece of written text that provides information about Makayla's experience during an Easter egg hunt. (option c)

(b) It also highlights how knowledge gained in the classroom can be applied to everyday life.

At the beginning of the passage, Makayla is getting ready to go on an Easter egg hunt. This is evident from the line "Makayla was getting ready for the Easter egg hunt at the park." Easter egg hunts are a popular tradition in many parts of the world, where children search for hidden eggs that are often filled with candy or small toys.

Hence the correct option is (c).

Throughout the story, Makayla remembers information that Mrs. Narula taught in class. Mrs. Narula is Makayla's science teacher, and the information she taught in class is about the process of photosynthesis. Photosynthesis is the process by which plants convert sunlight, water, and carbon dioxide into oxygen and sugar.

Makayla remembers this information as she observes the trees and plants in the park during the Easter egg hunt. She notes that the plants are producing oxygen through photosynthesis and that this process is essential for the survival of all living beings.

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PLSS help I will mark you brainiest 18ptsssssssss

Answers

Answer:

Step-by-step explanation:

The total number are 12+14+16=42

and the movie was not a comedy are adventure and drama which stands for 12 and 16. The total of them is 28.

So the movie was not a comedy is 28/42 = 2/3

Answer:

D.

Step-by-step explanation:

If you want to know the chance that the movie you watched was not a comedy, you have to do some math. Don't worry, it's not hard. You just need to use this formula:

P(not funny) = 1 - P(funny)

This means that the probability of not laughing is one minus the probability of laughing. How do we find the probability of laughing? Well, we look at how many movies are comedies and how many movies are total. In this case, there are 14 comedies and 42 movies in total. So we divide 14 by 42 and get:

P(funny) = 14 / 42

This fraction can be simplified to:

P(funny) = 1 / 3

Now we plug this into the formula and get:

P(not funny) = 1 - (1 / 3)

This can be simplified to:

P(not funny) = 2 / 3

So there you have it. The probability that the movie was not a comedy is 2 / 3. That means you have a higher chance of watching a boring movie than a funny one. Maybe you should pick a different genre next time.

The right answer is d. 2/3.

surface area of the triangular prism 5ft 5ft 4ft 6ft 18ft

Answers

The surface area of the triangular prism is 312 ft².

How to calculate the surface area of a prism?

In order to calculate the surface area of a prism, we  twice the perimeter of base of the prism to twice the area of the base of the prism

To calculate the surface area of the triangular prism in the question, we use the formula below

Formula:

S.A = bh+H(a+b+c).................. Equation 1

Where:

S.A = Surface area of the triangular prismb = Base of the triangleh = Height of the trianglea,c = The other two sides of the triangle

From the question,

Given:

b = 6 fth = 4 fta = c = 5 ftH = 18 ft

Substitute these values into equation 1

S.A = (6×4)+18(5+5+6)S.A = 24+228S.A = 312 ft²

Hence, the surface area is 312 ft².

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a randomly selected sample of 100 students was drawn from a population with an average grade point average (gpa) of 3.2 and a standard deviation of 0.2. the standard deviation of the sampling distribution of the sample mean is

Answers

The standard deviation of the sampling distribution of the sample mean is 0.02.

The standard deviation of the sampling distribution of the sample mean can be calculated using the formula:

σ/√n

Where σ is the population standard deviation and n is the sample size.

In this case, the population standard deviation (σ) is 0.2 and the sample size (n) is 100. Substituting these values in the formula gives:

0.2/√100

Simplifying, we get:

0.2/10 = 0.02

This means that if we were to take multiple random samples of size 100 from the population, the mean of each sample would vary around the population mean of 3.2, with a standard deviation of 0.02.

This is because the standard deviation of the sampling distribution represents the amount of variation in sample means around the population mean.

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let $a$ be the smallest integer satisfying the inequality $x^2 - 15 < 2x$, and let $b$ be the largest integer satisfying the same inequality. what is $b-a$?

Answers

the values of $a$ and $b$,is So, $b - a = 6$.using the smallest and largest integers within this interval. Since "integer" refers to whole numbers (both positive and negative), we can identify $a$ and $b$

let's first solve the given inequality $x^2 - 15 < 2x$. We can rewrite this inequality by moving all terms to one side:

$x^2 - 2x - 15 < 0$

Now, we want to factor the quadratic:

$(x - 5)(x + 3) < 0$

From this factored form, we can see that the quadratic changes sign at x = -3 and x = 5. This means the inequality holds between these values:

-3 < x < 5

Now, we want to find the smallest and largest integers within this interval. Since "integer" refers to whole numbers (both positive and negative), we can identify $a$ and $b$ as follows:

$a = -2$ (the smallest integer greater than -3)
$b = 4$ (the largest integer less than 5)

Finally, we need to find the difference $b - a$:

$b - a = 4 - (-2) = 4 + 2 = 6$

So, $b - a = 6$.

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Como se resuelve esto
2x²-11x=-14
Mediante factorizacion

Answers

The solutions to the equation are x = 7/2 or x = 2. This is because if either of the factors (2x - 7) or (x - 2) equals zero, then the whole expression will equal zero.

To solve the quadratic equation 2x²-11x=-14 by factorization, we need to rearrange the equation to bring all terms to one side so that it is in the form ax² + bx + c = 0.

First, we add 14 to both sides of the equation, which gives us:

2x² - 11x + 14 = 0

To factorize this quadratic equation, we need to find two numbers that multiply to give the constant term (14) and add to give the coefficient of the middle term (-11). In this case, the two numbers are -2 and -7, as (-2) x (-7) = 14 and (-2) + (-7) = -9.

Using these two numbers, we can rewrite the middle term as -2x - 7x, which gives us:

2x² - 2x - 7x + 14 = 0

We can then factorize the first two terms and the last two terms separately, which gives us:

2x(x - 1) - 7(x - 2) = 0

We can then use the distributive property to simplify the equation:

2x² - 2x - 7x + 14 = 0

2x(x - 1) - 7(x - 2) = 0

(2x - 7)(x - 2) = 0

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PS is the midsegment of the trapezoid QRTU.
If PS = 36 and QR = 48, what is TU?
T
R
S
TU =
U
P
Q

Answers

The length of segment TU is given as follows:

TU = 24 units.

How to obtain the length of segment TU?

The length of segment TU is obtained applying the trapezoid midsegment theorem, which states that the length of the midsegment of the trapezoid is equals to the mean of the length of the bases of the trapezoid.

The parameters for this problem are given as follows:

Midsegment PS = 36.Bases TU = x and QR = 48.

Hence the length of TU is obtained as follows:

36 = (x + 48)/2

x + 48 = 72

x = 24.

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please help me this is due tomorrow

Answers

Answer:

Step-by-step explanation:

This graph represents the line of best fit for some dataset.

It is reduced to a linear function in this instance with a constant slope, where x represents the independent variable and y, the dependent variable. This shows us quiz score is supposedly directly proportional to the time spent on homework per week in hours.

To find the amount of time someone should expect to study to get a 96% on their quiz you need to resolve the linear function modeled by y=mx+b which is in slope-intercept form. where m is the slope and b is the y-intercept. the y-intercept can be found when x = 0  which is shown in the graph to be 63, to solve for slope you can use the equation [tex]\frac{y_{2}-y_{1} }{x_{2}-x_{1} }[/tex] which is rise/ run. then plug in any 2 points I will use (1,69) and (2,75) [tex]\frac{75-69 }{2-1 }[/tex] or 6 which means m = 6, therefore, our equation is y = 6x + 63 and because we know that y must be 96 for this question, we can solve for x using inverse operations. 96 = 6x + 63 subtract 63 from both sides and 6x = 33 then divide by 6 and 33/6 = 5.5 so a person should expect to study 5.5 hours to get a quiz score of 96%

There are 31 students in a class. Each student was asked how many pets he has at home. The table below summarizes the data.
Based on the data, estimate the probability that a randomly selected student from this class has four or more pets at home. Round your answer to the nearest two decimal places.

Answers

The probability that a randomly selected student from this class has four or more pets at home is 4/31 ≈ 0.13 when rounded to the nearest two decimal places.

Explain probability

Probability is a measure of the likelihood or chance of an event occurring. It is a numerical value between 0 and 1, with 0 indicating no chance and 1 indicating certainty. Probability is calculated by dividing the number of desired outcomes by the total number of possible outcomes. It is used in many fields, including mathematics, statistics, science, and engineering.

According to the given information

Based on the data provided, there are a total of 4 students who have four or more pets at home

(0 with 4 pets + 1 with 5 pets + 2 with 6 pets + 1 with 7 pets).

Since there are a total of 31 students in the class, the probability that a randomly selected student from this class has four or more pets at home is 4/31 ≈ 0.13 when rounded to the nearest two decimal places.

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Please help!! I’m so behind

Answers

To find the area of a specific parallelogram, we need to know the length of its base and the height.

What is the area of the parallelogram?

To find the area of a parallelogram, we multiply the base of the parallelogram by its height, where the height is the perpendicular distance between the base and its opposite side. So, the formula for the area of a parallelogram is:

Area = base x height

where the base and height are both expressed in the same units.

We know that the area of the parallelogram can be given as bh or absinα

Thus we have for each of the parallelograms shown;

1) 6 * 4 = 24 ft^2

2) 9 * 5 = 45 yd^2

3) 8 * 10 sin 45 = 56.6 cm^2

4) 5 * 11 sin 60 = 47.6 m^2

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Find the amount of money Amber can afford to borrow using the banker's rule. Amber makes $32,300 annually. What is the amount that can be borrowed?

Answers

According to the banker's rule, Amber can afford to borrow a maximum of $96,900.

What is the amount that can be borrowed?

The banker's rule is a guideline used by some lenders to determine the maximum amount that an individual can borrow based on their annual income.

According to the banker's rule, the maximum amount that can be borrowed is typically a multiple of the borrower's annual income.

The exact multiple used in the banker's rule may vary depending on the lender and the borrower's financial situation, but a common multiple used is 3.

Therefore, to calculate the amount that Amber can afford to borrow using the banker's rule, we can multiply her annual income by 3.

Given that Amber makes $32,300 annually, we can calculate the amount that can be borrowed using the banker's rule as follows:

Maximum amount that can be borrowed = Annual income * Banker's rule multiple

Maximum amount that can be borrowed = $32,300 * 3

Maximum amount that can be borrowed = $96,900

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linda has one square rug and two identical rectangular rugs. she arranged them in two different ways and took two measurements as shown below. what is the side length of the square rug?

Answers

Answer: Let the side length of the square rug be x, and the dimensions of the rectangular rug be l and w.

In the first arrangement, the three rugs are arranged side by side, with the rectangular rugs aligned vertically and the square rug aligned horizontally. The length of this arrangement is l + 2x, and the width is w. We know that the length is 3 times the width, so we can write:

l + 2x = 3w

In the second arrangement, the two rectangular rugs are arranged side by side, with the square rug placed on top. The length of this arrangement is l, and the width is w + x. We know that the length is twice the width, so we can write:

l = 2(w + x)

We now have two equations with two unknowns, l and w:

l + 2x = 3w

l = 2(w + x)

Substituting the second equation into the first, we get:

2(w + x) + 2x = 3w

4x = w

Substituting this value of w into the second equation, we get:

l = 2(4x) = 8x

So the dimensions of the rectangular rug are 4x by x, and the dimensions of the square rug are x by x.

To find the value of x, we use the measurements given in the diagram:

l + 2x = 60

l = 36

Substituting into the equation l = 2(w + x), we get:

36 = 2(4x + x)

36 = 10x

x = 3.6

So the side length of the square rug is 3.6 feet.

Step-by-step explanation:

Compute the orthogonal projection of v⃗ =[−7−9]

onto the line L

through [26]

and the origin

Answers

The orthogonal projection of [tex]\vec{V}[/tex] =[−7−9] onto the line L through [26] and the origin is given by the vector [-69/10 -207/10].

What is algebra?

Algebra is a branch of mathematics that deals with mathematical operations and symbols used to represent numbers and quantities in equations and formulas.

To find the orthogonal projection of a vector  [tex]\vec{V}[/tex]  onto a line L, we need to follow these steps:

Find a vector [tex]\vec{n}[/tex]  that is orthogonal to the line L.

Find the projection of  [tex]\vec{v}[/tex] onto [tex]\vec{n}[/tex] . This projection will be a scalar.

The orthogonal projection of [tex]\vec{v}[/tex]  onto L is the vector that is obtained by multiplying the scalar projection of [tex]\vec{v}[/tex]  onto [tex]\vec{n}[/tex]  by the unit vector in the direction of L.

Let's apply these steps to the problem at hand:

Step 1: Find a vector [tex]\vec{n}[/tex] that is orthogonal to the line L.

The line L passes through [2 6] and the origin, so we can find the direction vector of the line by subtracting the two points:

[tex]\vec{d}[/tex] = [2 6]−[0 0]=[2 6].

To find a vector that is orthogonal to [tex]\vec{d}[/tex], we can take the cross product of  [tex]\vec{d}[/tex]with the vector [0 0 1]:

[tex]\vec{n}[/tex] = [tex]\vec{d}[/tex]  × [0 0 1] = [−6 2 0].

Step 2: Find the projection of  [tex]\vec{v}[/tex]onto [tex]\vec{n}[/tex]  .

The projection of  [tex]\vec{v}[/tex] onto  [tex]\vec{n}[/tex] is given by the formula:

proj n v = ( [tex]\vec{v}[/tex] ·  [tex]\vec{n}[/tex] ) / || [tex]\vec{n}[/tex] ||² *  [tex]\vec{n}[/tex]

where · denotes the dot product and ||  [tex]\vec{n}[/tex] || is the magnitude of  [tex]\vec{n}[/tex] .

Substituting the values we have:

proj n v = ([-7 -9] · [-6 2 0]) / ||[-6 2 0]||² * [-6 2 0]

= (-54 + (-18)) / (36 + 4) × [-6 2 0]

= -72/40 × [-6 2 0]

= [-27 9 0]/5

Step 3: The orthogonal projection [tex]\vec{v}[/tex] onto L is given by:

proj L v = (proj n v · [tex]\vec{d}[/tex]  / || [tex]\vec{d}[/tex]  ||²) × [tex]\vec{d}[/tex]  / || [tex]\vec{d}[/tex]  ||

where || [tex]\vec{d}[/tex] || is the magnitude of  [tex]\vec{d}[/tex]  .

Substituting the values we have:

proj L v = ([−27 9 0]/5 · [2 6]/(2² + 6²)) * [2 6]/(2² + 6²)

= -207/40 * [2 6]

= [-69/10 -207/10]

Therefore, the orthogonal projection of  [tex]\vec{v}[/tex] =[−7−9] onto the line L through [26] and the origin is given by the vector [-69/10 -207/10].

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Select the figure that shows a division into composite parts. Then find the area of the figure. Each square represents 1 square unit. Round to the nearest tenth, if necessary. The area of the composite figure is sq. units.

Answers

The total area is given as 30 sq units.

What is Area of a Composite Figure?

A composite figure is a two-dimensional shape that is made up of two or more simpler shapes, such as squares, rectangles, triangles, circles, or trapezoids. The area of a composite figure is the total amount of space that is enclosed within its boundaries.

To find the area of a composite figure, you need to first identify all of the individual shapes that make up the figure. Then, you can find the area of each shape using the appropriate formula. Finally, you add up the areas of all the shapes to get the total area of the composite figure.

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example of writing a linear approximation and approximating the value of a functionIf y = 2x2 + x - 4, find the equation of the tangent when x = 1.

Answers

The equation of the tangent line to the function y = 2x^2 + x - 4 at the point x = 1 is y + 1 = 5(x - 1).

To find the equation of the tangent line to the function y = 2x^2 + x - 4 at the point x = 1,

we will follow these steps:
Evaluate the function at x = 1 to find the point (1, y):
[tex]y = 2(1)^2 + 1 - 4[/tex]
y = 2 + 1 - 4
y = -1
So, the point is (1, -1).
Find the derivative of the function to get the slope of the tangent line:
[tex]dy/dx = d(2x^2 + x - 4)/dx[/tex]
dy/dx = 4x + 1
Evaluate the derivative at x = 1 to find the slope of the tangent line:
m = 4(1) + 1
m = 5
Use the point-slope form to find the equation of the tangent line:
y - y1 = m(x - x1)
y - (-1) = 5(x - 1).

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In matrix C, the entries are the numbers of students in a chess club at a high school. Column 1 lists boys, column 2 lists girls, row 1 lists juniors, and row 2 lists seniors. What does the number in position c21 represent? C=[5463] A. 4 girls who are juniors B. 4 boys who are seniors C. 6 girls who are seniors D. 6 boys who are juniors

Answers

C21 represents 4 senior boys.

What is a Matrix?

A matrix, which is used to represent a mathematical object or an attribute of one, is a rectangular array or table containing numbers, symbols, or expressions that are organized in rows and columns. is a matrix having two rows and three columns, for instance

Given:

[tex]\left[\begin{array}{ccc}5&6\\4&3\\\end{array}\right][/tex], [tex]\left[\begin{array}{ccc}c11&c12\\c21&c22\\\end{array}\right][/tex]

[tex]\left[\begin{array}{ccc}Junior boy&Junior girl\\Senior boy&Senior girl\\\end{array}\right][/tex]

4 Senior boys is c21 represented.

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Write an equation in vertex form (-2,0)

Answers

The required vertex form from the given points (-2, 0) is f(x) = a(x – h)2 + k respectively.

What is a quadratic function?

A polynomial of degree two in one or more variables is known as a quadratic polynomial in mathematics.

A quadratic function is a polynomial function that a quadratic polynomial defines.

The graph of a quadratic function resembles a parabola.

A polynomial equation with a maximum degree of two is referred to as a quadratic equation. Where a 0, the equation is given by ax² + bx + c = 0.

A quadratic function has the vertex form f(x) = a(x - h)2 + k, where a, h, and k are constants.

So, we have the points:
(-2, 0)

Now, insert the values in the form: f(x) = a(x – h)2 + k

Where, a, h, and k are constants.

Then, the vertex form would be:

f(x) = a(-2 – h)2 + k


Therefore, the required vertex form from the given points (-2, 0) is f(x) = a(x – h)2 + k respectively.

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On what interval is the function positive?


f(x) = 2(6)^(x+1) -3


Enter your answer, in interval notation. Round any necessary values to the nearest tenth.

Answers

The function f(x) is positive on the interval (-0.744, infinity).

In interval notation: (−0.744, ∞).

What is a function?

A function is a relationship between inputs in which each input corresponds to exactly one output.

When [tex]f(x) = 2(6)^{X+1} -3[/tex] is greater than zero, it is positive.

[tex]2(6)^{(x+1) } - 3 > 02(6)^{(x+1)} > 3(6)^{ (x+1) } > 3/2[/tex]

Now taking logs on both sides gives

[tex]log(6)^{ (x+1) } > log3/2[/tex]

(x+1) * log6 > log3/2

(x+1) > [tex]\frac{log3/2}{log6}[/tex]

(x+1) > [tex]\frac{0.17609}{ 0.77815}[/tex]

(x +1) > 0.2265

x > 0.2265 - 1

x > -0.7735

Thus, the function f(x) is positive on the interval (-0.744, infinity).

In interval notation: (−0.744, ∞).

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A credit card starts new customers at a $2,000 limit when they are approved for a card. The company adds $500 annually to this limit for customers who pay their bill on time. Choose the equation below that gives the credit limit, Ln, of customers who have payed on time every year, and who are in their nth year of having the card. Then, use this equation to find the credit limit of a customer in their 10th year of having the card.

Answers

On solving the provided question we can say that As a result, the credit equation limit of a client who has paid on time every year for the past ten years is $7,000.

What is equation?

A mathematical equation is a formula that links two statements and uses the equals sign (=) to indicate equality. In algebra, an equation is a statement that demonstrates the equality of two mathematical expressions. The equal sign divides the variables 3x + 5 and 14 in the equation 3x + 5 = 14, for instance.

The relationship between the two sentences that are located on opposite sides of a letter is explained by a mathematical formula. Frequently, the symbol and the single variable are identical. like in 2x - 4 = 2, for example.

The following equation determines the credit limit, Ln, of customers who have made on-time payments each year and are in the nth year of card ownership:

Ln = $2,000 + $500n

where Ln stands for the credit limit in the nth year and n is the number of years the cardholder has had it.

In the equation above, we substitute n=10 to get a customer's credit limit after ten years of card use:

L10 = $2,000 + $500(10)

L10 = $2,000 + $5,000

L10 = $7,000

As a result, a client with a ten-year history of on-time payments has a credit limit of $7,000.

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A PARTIALLY SHADED RECTANGLE IS SHOWN BELOW, WHAT IS THE AREA, IN SQUARE CENTIMETERS, OF THE SHADED PART OF THE RECTANGLE?

Answers

The calculated area of the shaded region is 56 square cm


Calculating the area of the shaded region

The shaded region is a triangle

The formula for the area of a triangle is:

A = 1/2 * base * height

where A is the area of the triangle, base is the length of the base of the triangle, and height is the height of the triangle perpendicular to the base.

Using the given values, we can substitute base = 8 and height = 14 into the formula to get:

A = 1/2 * 8 * 14 = 56

Therefore, the area of the triangle is 56 square units.

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I went hiking over the weekend. I hiked 1 3/4 miles when I came to a fork
in the trail. I went to the right. I hiked another 2 1/2 miles until I reached
the overlook. How far did I hike to get there?

O 4 1/4
O 4 1/2
O 4 1/3
O 4 1/5

Answers

Over the weekend, I went hiking. I had hiked 1 3/4 miles when I came to a trail fork. I turned to the right. I continued hiking for another 2 1/2 km till I arrived at the lookout. I hiked for A) 4 1/4 miles to get there.

In this question, we have been given that the person first hikes for 1 3/4 miles and then for 2 1/2 miles, so we will first convert them into mixed fractions and we will add the fractions.

Total miles hiked to get there = 1 3/4 miles + 2 1/2 miles

= 7 / 4 miles + 5/2 miles

= (7 + 10) / 2 miles

= 17 / 2 miles

= 4 1/4 miles

If the denominators of two fractions are the same (such fractions are said to be similar fractions), they can be added directly. If the denominators are different (such fractions are known as unlike fractions), we must change the denominators and then add the fractions.

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Before working through each problem, identify the principal, rate, time. Work with your shoulder-partner to find the solution. • Mr. Jackson deposited $1,250 in a new account at his bank. • The bank pays 3.5% simple interest • Mr. Jackson pays no additional deposits or withdrawals. o What amount is closest to the balance of the account at the end of 2 years?

Answers

Thus, the amount of the money in the bank account at the end of 2 years is found to be: $1337.5.

Explain about the term simple interest:

Simple interest denotes interest that is simply charged on the principal amount, which is the original amount borrowed or deposited. The interest charge is going to be applied once, regardless of how frequently it is applied. Many loans base their calculations on simple interest, but you should double-check before signing anything.

Given data:

Principal P = $1,250Simple Interest rate R = 3.5%Time T = 2 years

Formula for the estimating simple interest:

SI = PRT/100

SI = 1250*3.5*2 / 100

SI = 87.5

Amount = principal + simple interest

A = 1250 + 87.5

A = 1337.5

Thus, the amount of the money in the bank account at the end of 2 years is found to be: $1337.5.

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a survey of middle school students asked participants how they get to school each morning. the results of the survey are summarized. students walk to school students ride in a car to school students take the bus to school students ride their bikes to school what type of data set was created using this survey?\

Answers

The data set created from this survey is a categorical or nominal data set.

Categorical data is a type of data that can be divided into groups or categories based on specific characteristics or attributes. In this case, the groups are based on the mode of transportation used by the middle school students to get to school. The categories in this data set are "walk," "car," "bus," and "bike." Categorical data can be further classified as either nominal or ordinal.

Nominal data is a type of categorical data where the categories do not have any particular order or ranking, while ordinal data has a specific order or ranking. In this case, the categories "walk," "car," "bus," and "bike" do not have any specific order or ranking, so this data set is an example of nominal categorical data.

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I don't understand this question. simplify -3(x+7)

Answers

Answer: - 3x - 21

Step-by-step explanation:

All you have to do is distribute the -3

-3 multiplied by x is -3x

and -3 multiplied by +7 is -21

put it together

- 3x - 21

I don’t know how to do this pls help

Answers

Using circle theorems CD =  9.17

What are circle theorems?

Circle theorems are theorems that govern circle properties.

Given that form the figure EF = 8, ON = 3 and OM = 2, we need to find CD.

From the figure using Pythagoras' theorem

OE² = ON² + EN²

= ON² + (EF/2)²

= 3² + (8/2)²

= 3² + 4²

= 9 + 16

= 25

OE = √25

= 5

Also, OD² = OM² + DM²

Making DM subject of the formula, we have that

DM² = OD² - OM²

DM = √(OD² - OM²)

Now OD = OE = 5

So, we have that

= √(OD² - OM²)

= √(OE² - OM²)

= √(5² - 2²)

= √(25 - 4)

= √(25 - 4)

= √21

= 4.58

Now CD = 2DM

= 2 × 4.58

= 9.17

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Find the volume of the right cone below. Round your answer to the nearest tenth if necessary.
21
8

Answers

The requreid volume of the right cone is 1,411.2 cubic units.

We need to use the formula for the volume of a cone:
[tex]V = (1/3)\pi r^2h[/tex],


where r is the radius of the base of the cone and h is the height of the cone.We are given that the height of the cone is 21 and the radius of the base is 8.

V = (1/3)π(8²)(21)
V = 1,411.2 cubic units (rounded to the nearest tenth).

Therefore, the volume of the right cone is approximately 1,411.2 cubic units.

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if the inverse demand function for toasters is p=100-20 what is the consumer surplus if price is $35? The consumer surplus is $ (round your answer to two decimal places)

Answers

Given the inverse demand function p = 100 - 20q for toasters and a price of $35, we can find the consumer surplus.

First, we'll find the quantity demanded at the given price:

35 = 100 - 20q
20q = 100 - 35
q = (100 - 35) / 20
q = 65 / 20
q = 3.25

Now, to find the consumer surplus, we'll use the formula:

Consumer Surplus = (1/2) × Base × Height

The base represents the quantity (q = 3.25) and the height is the difference between the maximum willingness to pay (p = 100) and the actual price (p = 35).

Consumer Surplus = (1/2) × 3.25 × (100 - 35)
Consumer Surplus = 0.5 × 3.25 × 65
Consumer Surplus = 105.625

So, the consumer surplus is $105.63 when rounded to two decimal places.

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Frahan travels from Town A to Town B at an average speed of 4 Km/h and from Town B to Town A at an average
speed of 3 Km/h. He takes 25 minutes to complete the entire journey.
(a) Convert 25 minutes into hours.
(b) Find his total distance travelled.

Answers

to convert 25min into hours we divide 25 by 60 so the answer would be 0.416 hours

the formula to find the distance is we multiply speed and time so

distance=4km/p X 0.416 hours =1.664

so now we have the first answer

now we do the same thing for the other part of the question

distance= timeXspeed

distance=0.416X3=1.248

then we add to find total distance

1.248+1.644=2.912

2.912 is the total distance

Water vapor constitutes about this much of the atmosphere by volume.
-0-4 percent
-4-12 percent
-0-12 percent
-0-100 percent
-4-25 percent

Answers

Water vapor is an important component of the Earth's atmosphere, and it plays a crucial role in regulating the climate. water vapor makes up about 0-4% of the Earth's atmosphere by volume . So the correct option is A.

 

It is a greenhouse gas, which means that it can trap heat in the atmosphere and contribute to global warming. The amount of water vapor in the atmosphere can vary depending on location, temperature, and weather conditions. On average, water vapor makes up about 0-4% of the Earth's atmosphere by volume. This may seem like a small amount, but it has a significant impact on weather patterns and climate. As temperatures rise due to climate change, the amount of water vapor in the atmosphere is expected to increase, which could have further impacts on global climate.

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Find the surface area of a regular pentagonal prism with a height of 3.5 inches and a base edge length of 2 inches. Round your answer to the nearest hundredth, if necessary.

Answers

Answer: 48.76 square inches.

Step-by-step explanation: A regular pentagonal prism has 7 faces: 2 pentagonal bases and 5 rectangular faces.

To find the surface area, we need to find the area of each face and add them up.

The area of one pentagonal base can be found using the formula:

A = (5/4) * (edge length)^2 * cot(π/5)

Substituting the given values, we get:

A = (5/4) * (2)^2 * cot(π/5)

≈ 6.8819 square inches (rounded to the nearest hundredth)

Since there are two pentagonal bases, their total area is:

2A ≈ 13.7638 square inches

The area of one rectangular face can be found using the formula:

A = (edge length) * (height)

Substituting the given values, we get:

A = 2 * 3.5

= 7 square inches

Since there are five rectangular faces, their total area is:

5A = 5 * 7 = 35 square inches

Therefore, the total surface area of the regular pentagonal prism is approximately:

13.7638 + 35 = 48.7638 square inches

Rounding to the nearest hundredth, we get:

Surface area ≈ 48.76 square inches.

The surface area of a regular pentagonal prism is 193.82 square inches.

What is a prism?

A prism is a three-dimensional object.

There are triangular prism and rectangular prism.

We have,

The formula for the surface area of a regular pentagonal prism is:

SA = 5 × base area + 5 × lateral face area

where the base area is the area of one of the pentagonal bases, and the lateral face area is the area of one of the rectangular faces.

Since the base is a regular pentagon, we can use the formula for the area of a regular pentagon:

Area of pentagon = (1/4) × n × s² × tan(180°/n)

where n is the number of sides of the pentagon (which is 5 since it's a regular pentagon), and s is the length of one of its sides.

In this case,

s = 2 inches

Area of pentagon = (1/4) × 5 × 2² × tan(180°/5)

Area of the pentagon = 6.8819 square inches

This is the area of one of the pentagonal bases.

Since there are two bases,

The total base area is:

Base area = 2 × 6.8819

                 = 13.7638 square inches

Now,

Each lateral face is a rectangle with a width equal to the base edge length (2 inches) and a height equal to the height of the prism (3.5 inches).

Lateral face area.

= base edge length × height

= 2 inches × 3.5 inches

= 7 square inches

Since there are five lateral faces, the total lateral face area is:

Lateral face area

= 5 × 7

= 35 square inches

Now we can add up the base area and lateral face area to get the total surface area:

SA = 5 × base area + 5 × lateral face area

     = 5(13.7638) + 5(35)

     = 193.819 square inches

Rounding this to the nearest hundredth.

SA = 193.82 square inches

Thus,

The surface area of a regular pentagonal prism is 193.82 square inches.

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