You earn 15n dollars for mowing n lawns. How much do you earn for mowing 1 lawn? 7 lawns?

Using the normal distribution, the middle 50% would be expected to be in the range of 250 to 270 days.

Using the central limit theorem, for the samples of 36, the middle 50% would be expected to be in the range of 258 to 262 days.

A sort of continuous probability distribution for a real-valued random variable is the normal distribution or the Gaussian distribution.

Normal Distribution of Probabilities

The z-score formula, which for a measure X, in a set with mean and standard deviation, is given by: can be used to address problems with normal distributions.

Z = (X - μ)/σ

The z-score calculates the measure's standard deviation from the mean.

A p-value, or percentile of X, is assigned to each z-score.

Mean (μ) = 260.

Standard deviation (σ)= 15 .

The normal distribution is symmetric, which means that the middle 50% is between the 25th percentile and the 75th percentile.

The 25th percentile is X when Z has a p-value of 0.25, so X when Z = -0.675.

The 75th percentile is X when Z has a p-value of 0.75, so X when Z = 0.675.

Lower bound:

Z = (X - μ)/σ

⇒ -0.675 = (X - 260)/15

⇒ X - 260 = -0.675*15

⇒ X - 260 = -10.125

⇒ X = 260 - 10.125

⇒ X ≈ 250

Upper bound:

Z = (X - μ)/σ

⇒ 0.675 = (X - 260)/15

⇒ X - 260 = 0.675*15

⇒ X - 260 = 10.125

⇒ X = 260 + 10.125

⇒ X ≈ 270

The middle 50% of pregnancies would be in the range of 250 to 270 days.

For sample of 36: By the Central Limit Theorem, the standard deviation of the sampling distribution of sample means of size n is given by .

Sample of 36, thus n=36, s=15/√36

⇒ s=15/6

⇒ s=2.5

Lower bound:

Z = (X - μ)/s

⇒ -0.675 = (X - 260)/2.5

⇒ X - 260 = -0.675*2.5

⇒ X - 260 = -1.69

⇒ X = 260 - 1.69

⇒ X ≈ 258

Upper bound:

Z = (X - μ)/s

⇒ 0.675 = (X - 260)/2.5

⇒ X - 260 = 0.675*2.5

⇒ X - 260 = 1.69

⇒ X = 260 + 1.69

⇒ X ≈ 262

The middle 50% of pregnancies would be in the range of 258 to 262 days.

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Answer:

m = -21.

Step-by-step explanation:

To solve this equation, we can use the distributive property to expand the left side and the right side of the equation:

19(2m - 16) = 13(2m + 4)

38m - 304 = 26m + 52

Then we can combine like terms on both sides of the equation to obtain:

38m - 26m = 52 - 304

12m = -252

Finally, we can divide both sides of the equation by 12 to find the value of m:

12m / 12 = -252 / 12

m = -21

Therefore, the value of m that satisfies the equation is m = -21.

Answer:

Read carefully below

Step-by-step explanation:

In general, the inverse of a function f(x) is a function g(x) such that f(g(x)) = g(f(x)) = x for all values of x in the domain of f(x) and g(x). To find the inverse of a function, we need to switch the input and output variables and solve for the new output variable.

In this case, we are given the function -2f(x+5)-4. To find the inverse of this function, we need to switch the input and output variables and solve for the new output variable, which we will call y. We can do this by first moving all the terms to one side of the equation, and then solving for y:

-2f(x+5) - 4 = y

-2f(x+5) = y + 4

f(x+5) = (y + 4) / -2

This is the inverse function of -2f(x+5)-4. However, keep in mind that not all functions have inverses. In particular, a function must have the property that it is one-to-one (i.e. it maps unique inputs to unique outputs) in order to have an inverse. It is not clear from the given information whether the function -2f(x+5)-4 is one-to-one, so it is possible that it does not have an inverse.

Answer: See attached for the graph.

Step-by-step explanation:

     To find the answer to this question, we will isolate the variable x.

   Given:

|x| + 3 > 3

   Subtract 3 from both sides of the equation:

|x| > 0

  Aboslute value:

x > 0, x < 0

   This means the graph will be greater than or less than 0.

Answer:

22mile=1sec

x=360sec

criss cross method

(x)(1)=360×22

x=7920miles

Answer:

Step-by-step explanation: y+9=-3(x-4)......given equation

This equation can be expanded further and simplified

y+9=-3x+12

We want to put the equation into the form y=mx+b so we can read its characteristics

To do this we need to get y on its own. We must take 9 from both sides

y+9-9=-3x-9+12

y=-3x+3

The equation has a gradient or slope or m =-3 and it cuts the y-axis at +3 or is the yintercept

It s true that a text file contains bytes of data that represent characters from a particular character set such as Unicode or ASCII. The correct option to this question is "True".

The text file contains texts that are represented by Unicode or ASCII. The Unicode or ASCII represents how the numbers, text, or other commands are displayed and written in a text file.

To represent text digitally in the text file, characters have their own unique character representation bit-pattern. These bit-pattern have a combination of 1s and 0s. And these patterns are represented by character codes that are either Unicode or ASCII.

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The equivalent expression to {(2 3/10)⁴ ÷ (9/10)⁵}⁴ is "2 and three tenths raised to the sixteenth power divided by nine tenths raised to the twentieth power".

The correct answer choice is option B

Exponents refers to the power to which a number, expression or symbol is to be raised. For instance, 4²; the exponent is 2 which is a power.

{(2 3/10)⁴ ÷ (9/10)⁵}⁴

= (2.3⁴ ÷ 0.9⁵)⁴

Multiply the powers

= 2.3¹⁶ ÷ 0.9²⁰

It can also be written as

(2.3)¹⁶ / (0.9)²⁰

Consequently, the expression which is equivalent to 2 and three tenths raised to the fourth power divided by nine tenths raised to the fifth power, all raised to the fourth power is (2.3)¹⁶ / (0.9)²⁰

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Answer:

I am 100% sure it is b

Step-by-step explanation:

I have proof( i did the test) and took a picture

Answer:

maybe 16

I hope I helped

Step-by-step explanation:

joining m < 5 = m < 7

8x – 14 = 5x + 34

8x – 5x = 34 + 14

3x = 48

divide both sides by 3

x = 48/3

x = 16

Answer:

1,100

Step-by-step explanation:

1000 x 0.1 = 100

1000 + 100 = 1,100

Divide by 12 to go from the APR to the monthly interest rate

(9.5%)/12 = 0.7916667%

The decimal form is 0.007916667 approximately.

Multiply this with the starting balance $1367.90 and we get:

0.007916667*1367.90 = 10.8292 which rounds to 10.83

The interest payment for the 1st month is $10.83; which means the principal payment would be 400-10.83 = 389.17

This principal payment will then drop the balance from $1367.90 to 1367.90-389.17 = 978.73 dollars.

The value $978.73 is now the starting balance of the 2nd month. This process of...

is repeated until the balance is $0.

This is what the table would look like

[tex]\begin{array}{|c|c|c|c|c|c|} \cline{1-6}\text{Month} & \text{Starting} & \text{Interest} & \text{Principal} & \text{Payment} & \text{Ending }\\& \text{Balance} & & & & \text{Balance}\\\cline{1-6}1 & 1367.9 & 10.83 & 389.17 & 400 & 978.73\\\cline{1-6}2 & 978.73 & 7.75 & 392.25 & 400 & 586.48\\\cline{1-6}3 & 586.48 & 4.64 & 395.36 & 400 & 191.12\\\cline{1-6}4 & 191.12 & 1.51 & 191.12 & 192.63 & 0\\\cline{1-6}\end{array}[/tex]

Many credit card companies and banks offer free calculators on their website, or you can find similar free calculators online elsewhere, that will quickly calculate a table like shown above. It is called an amortization table or amortization schedule.

With the exception of the 4th month, each row has the principal and interest add to the $400 monthly payment. The last row will have a payment of 1.51+191.12 = 192.63 dollars.

The total amount paid back would be 400+400+400+192.63 = 1392.63 dollars. This is the sum of the values in the "payment" column.

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Here's another way to determine the answer.

The monthly payment formula is

[tex]\displaystyle P = \frac{Li}{1 - (1+i)^{-n}}[/tex]

where,

In this case,

Let's solve for the variable n. We'll need logarithms to isolate the exponent.

Part 1

[tex]\displaystyle P = \frac{Li}{1 - (1+i)^{-n}}\\\\\\\displaystyle 400 = \frac{1367.90*0.007916667}{1 - (1+0.007916667)^{-n}}\\\\\\\displaystyle 400 = \frac{10.8292087893}{1 - (1.007916667)^{-n}}\\\\\\\displaystyle 400(1 - (1.007916667)^{-n}) = 10.8292087893\\\\\\[/tex]

Part 2

[tex]\displaystyle 1 - (1.007916667)^{-n} = 10.8292087893/400\\\\\\\displaystyle 1 - (1.007916667)^{-n} = 0.0270730\\\\\\\displaystyle -(1.007916667)^{-n} = 0.0270730-1\\\\\\\displaystyle -(1.007916667)^{-n} = -0.9729270\\\\\\\displaystyle (1.007916667)^{-n} = 0.9729270\\\\\\[/tex]

Part 3

[tex]\displaystyle \log((1.007916667)^{-n}) = \log(0.9729270)\\\\\\\displaystyle -n*\log(1.007916667) = \log(0.9729270)\\\\\\\displaystyle n = -\log(0.9729270)/\log(1.007916667)\\\\\\\displaystyle n = 3.4805965\\\\\\[/tex]

Each decimal value is approximate.

That value of n then rounds up to the nearest integer n = 4

We do not round to n = 3 since that would be one month short, as shown in the table above.

You can use a graphing calculator to quickly solve that equation for the variable n. It can be used as a way to visually confirm the answer.

Answer:

let x as hotdog and x + 42 as soda

x + x + 42 = 250

2x + 42 = 250

2x + 42 - 42 = 250 - 42

2x = 208

x = 104

sodas sold: x + 42 = 104 + 42 = 146 sodas

hotdogs sold: x = 104 hotdogs

Step-by-step explanation:

Answer:

104 hot dogs sold

146 sodas sold

Step-by-step explanation:

s=number of sodas. h=number of hotdogs

s+h=250

s=h+42  ==> there were 42 more sells for soda than compared to hot dog

h+42+h=250  ==> plugin h+42 for s

h+h+42=250 ==> simplify

2h+42=250 ==> solve for h

2h+42-42=250-42 ==> isolate h by subtracting 42 on both sides

2h = 208

h = 208/2

h = 104 hot dogs sold

s=104+42  ==> plug in 104 for h in s=h+42

s = 146 sodas sold

Answer:

4a)   [tex]P=2L+2W[/tex]

4b)  

       [tex]42=2L+2W\\L=2W+3[/tex]

4c)  

     [tex]L=15\\W=6[/tex]

Step-by-step explanation:

Note:

[tex]P=[/tex] Perimeter

[tex]L=[/tex] Length

[tex]W=[/tex] Width

The perimeter of a rectangle is the sum of all its sides.

We can say

[tex]P=L+L+W+W[/tex]

Which simplifies to

[tex]P=2L+2W[/tex]

This is the equation to find the perimeter of a rectangle.

We are given the perimeter which is 42.

We are also given that the length is the sum of twice its width and 3.

So we can write

[tex]42=2L+2W\\L=2W+3[/tex]

Lets solve using substitution.

Substitute [tex]L=2W+3[/tex] into the first equation.

[tex]42=2W+2(2W+3)[/tex]

Expand the right side of the equation then simplify.

[tex]42=2W+4W+6\\42=6W+6[/tex]

Subtract 6 from both sides.

[tex]36=6W[/tex]

Divide both sides by 6 to isolate [tex]W[/tex].

[tex]W=6[/tex]

Perform a back substitution.                                                                           Substitute [tex]W=6[/tex] into the second equation, [tex]L=2W+3[/tex]

[tex]L=(2*6)+3\\L=12+3\\L=15[/tex]

A rating/review would be much appreciated! Have a good Christmas!

The constant of proportionality for the data in the table is 65. This can be determined by dividing the number of trees planted by the number of weeks for each data point in the table. For example, for the first data point where 2 weeks have passed, 130 trees have been planted, which means the constant of proportionality is 65 (130 / 2 = 65). This value is the same for all of the data points in the table, which means it is the constant of proportionality for the data.

the work done is equal to the force applied (500 lb) multiplied by the distance (100 ft), resulting in 500 ft-lb of work done.

A force applied across a distance is what is referred to as work.

In this problem,

the force applied is the weight of the cable (5 lb/ft) multiplied by the length of the cable (100 ft).

Therefore, the work done is equal to the force applied (500 lb) multiplied by the distance (100 ft), resulting in 500 ft-lb of work done.Work is a force applied across a distance, and it is measured in a unit of energy called foot-pounds. In this problem, the force applied is the weight of the cable (5 lb/ft) multiplied by the length of the cable (100 ft). Therefore, the work done is equal to the force applied (500 lb) multiplied by the distance (100 ft), resulting in 500 ft-lb of work done. This means that 500 ft-lb of energy must be expended in order to move the cable 100 ft. This energy can be provided by a variety of sources, such as human labor, a motor, or some other mechanism.

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Answer:

30) 0.0,000,115

31) 0.00,000,000,022

32) 43,000,000,000

Step-by-step explanation:

30

1.15 x [tex]10^{-5}[/tex]  The negative exponent is telling us that the number in standards form is smaller than 1.15.  To write in standard form we move the decimal 5 places to the left.

0.0,000,115

31

2.2 x [tex]10^{-10}[/tex] This is like question 30, but we will move the decimal 10 places to the left this time.

0.00,000,000,022

32

4.3 x [tex]10^{10}[/tex]  the exponent is positive this time.  That means in standard from the number is much larger than 4.3.  Move the decimal point 10 places to the right.  If you do not see a decimal point, it means that it is at the end of the number.

43,000,000,000

Using the provided information we get,

a) Optimal quantity of city beautification projects is three.

b) 3124 city beautification is a public good because it is rival in consumption and non-excludable. So, Correct option is option (C).

The fictional city of Hurstville is trying to determine how many urban beautification projects it has. The city has two types of citizens, ones who appreciates beauty more than other type.

The average cost of each project = $400

We have given that

The combined marginal benefit curves are determined by horizontally adding up the in the individual marginal benefit curves. So, the optimal quantity of benefication projects is at the point where MSB is equal to MSE. Thus, the optimal outputs is 3 projects.

The city beneficiation is a public good because it is non-trivial in consumption and non-excludable.

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The equation that represents the number of time a cricket chirp (y) given the temperature (x) in degree Fahrenheit is y = 0.23 x + 40

Steps to translate a word problem into an equation or a function:

- Assign the unknowns to variables

- Identify which one is independent variables, which one is dependent variables. The independent variable will become the input while the dependent variable will become the output.

In the given problem, there are two variables:

- temperature in the air (in Fahrenheit)

- number of time a cricket chirp

From the problem, we can conclude that the number of time a cricket chirp depends on the temperature of the air. Hence,

independent variable =  temperature in the air (in Fahrenheit)

dependent variable = number of time a cricket chirp

Let:

y =  number of time a cricket chirp

x =  temperature in the air (in Fahrenheit)

It is said: The number of chirp per minute is equal to 0. 23 times the temperature of the air, in degree Fahrenheit, plus forty.

We can translate it into an equation:

y = 0.23 x + 40

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The illustrated volume of the cylinder is 769cm³.

One of the most fundamental curvilinear geometric shapes, a cylinder has traditionally been a three-dimensional solid. It is regarded as a prism with a circle as its base in basic geometry. In many contemporary branches of geometry and topology, a cylinder can also be defined as an infinite curvilinear surface.

It should be noted that the formula for finding the volume of a cylinder is πr²h

where π = 3.14

r = radius

h = height

Let's assume that the height is 5cm and radius is 7cm. The volume will be:

V = πr²h

Volume = 3.14 × 7² × 5

Volume = 769cm³

Note that your information was incomplete and an overview was given.

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Answer:

2/3 + -1/3 = positive 1/3

Answer:

To find the sum of 2/3 + (-1)/3, you can first convert the fraction to an equivalent fraction with a common denominator. In this case, the common denominator would be 3. 2/3 can be written as 2 x (3/3) = 2/3 and -1/3 can be written as -1 x (3/3) = -1/3. Then, you can add the numerators and the denominator will remain the same. So, the sum of 2/3 + (-1)/3 is 1/3.

The measurement of angles △XYZ are ∠X = 59°, ∠Y = 89°, and ∠Z = 32°.

The measurement of angles △LMN are ∠L = 59°, ∠M = 89°, and ∠N = 32°.

What is angle?

An angle is a figure in Euclidean geometry made up of two rays that share a common terminal and are referred to as the angle's sides and vertices, respectively. Angles created by two rays are in the plane where the rays are located. The meeting of two planes also creates angles. We refer to these as dihedral angles.

Given that, △XYZ and △LMN are similar triangle.

Since the triangles are similar, thus the measurement of triangles are similar.

Therefore,

∠X = ∠L, ∠Y = ∠M, ∠Z = ∠N.

∠Y = ∠M = 89° and ∠Z = ∠N = 32°.

The sum of all interior angles of triangle is 180°.

∠X + ∠Y + ∠Z = 180°

∠X + 89° + 32° = 180°

∠X + 121° = 180°

Subtract 121° from both sides:

∠X  = 59°

∠X = ∠L = 59°.

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Answer:

2,3 and 7

Step-by-step explanation:

168 = 2x2x2x3x7

= 2²x3x7

A plot of all the ordered pairs for the values in the domain is shown in the graph attached below.

In Mathematics, a domain can be defined as the set of all real numbers for which a particular function is defined. This ultimately implies that, a domain is the set of all possible input values (x-values) to a function and the domain of a graph consist of all the input numerical values which are shown on the x-axis.

Based on the values given for the domain of this function, the ordered pairs would be calculated as follows:

When x = -8, we have;

y = 1/2(-8) + 1

y = -3

Ordered pair = (-8, -3)

When x = -4, we have;

y = 1/2(-4) + 1

y = -1

Ordered pair = (-4, -1)

When x = 0, we have;

y = 1/2(0) + 1

y = 1

Ordered pair = (0, 1)

When x = 2, we have;

y = 1/2(2) + 1

y = 2

Ordered pair = (2, 2).

When x = 6, we have;

y = 1/2(6) + 1

y = 4

Ordered pair = (6, 4)

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To answer the question, Miae needs 3/8 cup of sugar for 1/2 of a batch, it is important to understand the concept of fractions. miae is baking .the recipe uses 3/4 cup sugar.Miae needs 3/8 cup of sugar for 1/2 of a batch.

To answer the question, Miae needs 3/8 cup of sugar for 1/2 of a batch, it is important to understand the concept of fractions. A fraction is a part of a whole, it is represented by a numerator and denominator, the numerator represents the number of parts and the denominator represents the total number of parts. In this question, the recipe calls for 3/4 cup of sugar for the entire batch, so to get 1/2 of the batch, Miae needs to divide the fraction by 2. To do this, we can either divide the numerator and denominator by 2, or multiply the fraction by 1/2. In this case, 3/4 multiplied by 1/2 is 3/8, so Miae needs 3/8 cup of sugar for 1/2 of a batch.

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Answer:

y= 6

Step-by-step explanation:

9³ = 3^y

3²^³ = 3^y

3⁶ = 3^y

therefore

y=6

Step-by-step explanation:

5.

y = 3

yes, that's it for this here too.

it means that any value for x is valid, and all have the assigned y value 3.

6.

remember, the usual equation for a line is

y = ax + b

"a" being the slope, "b" the y-intercept (the y-value when x = 0).

we see the y-value for x = 0 is 3. that is "b".

for the slope we need 2 points and calculate the x- and y- coordinate differences.

always look for points with integer coordinates.

I see e.g. (0, 3) and (3, 2).

x changes by +3 (from 0 to 3).

y charges by -1 (from 3 to 2).

the slope "a" = -1/+3 = -1/3

the equation is then

y = (-1/3)x + 3

7.

we do exactly the same things.

we see the y-value for x = 0 is +1. that is "b".

I see e.g. these points : (0, 1) and (3, 2).

x changes by +3 (from 0 to 3).

y changes by +1 (from 1 to 2).

the slope "a" is +1/+3 = 1/3.

the equation is

y = (1/3)x + 1

8.

and again the same things.

we see the y-value for x = 0 is +3. that is "b".

I see e.g. these points : (0, 3) and (-3, 0).

x changes by -3 (from 0 to -3).

y changes by -3 (from 3 to 0).

the slope "a" is -3/-3 = 3/3 = 1.

the equation is

y = x + 3

The exponential function in the form y = ab^x is y = 18(7)^x

From the question, we have the following parameters that can be used in our computation:

Points: (0, 18) and (3,6174).

The above can be represented as

(x, y) = (0, 18) and (3,6174).

An exponential function is represented as

y = ab^x

Where

a = y when x = 0

This means that

a = 18

So, we have

y = 18b^x

At (3,6174), we have

6174 = 18b^3

So, we have

343 = b^3

Take the cube root of both sides

b = 7

This means that

y = 18(7)^x

Hence, the function is y = 18(7)^x

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A function f such that f '(x) = 3x^3 and the line 81x + y = 0 is tangent to the graph of f is f(x) = 3x^4/4 + 729/4.

In the given question, we have to find a function f such that f'(x) = 3x^3 and the line 81x + y = 0 is tangent to the graph of f.

The given function is f'(x) = 3x^3.

No integrating on both side,

f(x) = [tex]\int3x^3dx[/tex] + C

f(x) = 3x^4/4 + C

As given, the line 81x + y = 0 is tangent to the graph of f.

So, slope at point of tangent; f'(x) = -81

So, 3x^3 = -81

Divide by 3 on both side, we get

x^3 = -27

Taking cube root on both side, we get

x = -3

So putting the value of x in 81x + y = 0, we get

y = 243

Thus, f(x) passes through (-3, 243).

So, 243 = 3/4(81) + C

Multiply by 4 on both side, we get

972 = 243 + 4C

Subtract 243 on both side, we get

4C = 729

Divide by 4 on both side, we get

C = 729/4

So, f(x) = 3x^4/4 + 729/4

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