Show that the plane and line with the given equations intersect, and then find the acute angle of intersection between them. (Give the angle in degrees and round to one decimal place.) The plane given by x + y + 2z = 0 and the line given by x = 2 + t y = 1 - 2t z = 3 + t. Substituting the parametric equations for the line into the equation for the plane and solving for t gives t = so that the plane and the line intersect at the point (x, y, z) = (). What is the acute angle of intersection? theta = degree

Answers

Answer 1

The acute angle of intersection is  5.2°.

What is acute angle?

Less than 90 degrees is the acute angle measurement. Right angles are 90 degrees in length. Angles that are obtuse are more than 90 degrees. Discover the various sorts of angles and examples of each.

The direction vector normal to the plane is ...

 n = (1, 1, 3)

The direction vector of the line is ...

 m = (1, -3, 1)

Then the angle θ between them can be found from the dot product:

 n•m = |n|·|m|·cos(θ)

 (1·1 +1(-3) +3·1) = 1 -3 +3 = 1 = √(1²+1²+3²)·√(1²+(-3)²+1²)·cos(θ)

 1 = 11·cos(θ)

 θ = arccos(1/11) ≈ 84.8°

This is the angle between the line and the normal to the plane, so the angle between the line and the plane will be the complement of this. Since this angle is not 90°, the line and plane must intersect.

 acute angle = 90° -84.8° = 5.2°

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Show That The Plane And Line With The Given Equations Intersect, And Then Find The Acute Angle Of Intersection

Related Questions

Suraj took a slice of pizza from the freezer and put it in the oven.
The pizza's temperature (in degrees Celsius) as a function of time (in minutes) is graphed.
What was the pizza's temperature after 2 minutes?

Answers

The temperature of the pizza that Suraj took from the freezer, after 2 minutes, given the graph, is 10 degrees Celsius.

How to find the temperature ?

The temperature of the pizza that Suraj took from the freezer and put in the oven, is shown on the graph. To find the temperature of this pizza after 2 minutes, given the line in the graph, look at the point where the 2 minutes on the x - axis, intercepts with the line.

This point on the y - axis is 10 degrees Celsius.

This simply means that at 2 minutes, Suraj's pizza slice had a temperature of 10 degrees Celsius.

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FILL IN THE BLANK. you transfer $100 from your savings account to your checking account. as a result, m1 will and m2 will .

Answers

You transfer $100 from your savings account to your checking account as a result, m1 will Remains unchanged and m2 will  increase by $100.

Checking and savings accounts are also a part of M2. Thus, moving $100 from a savings account to a checking account won't have an impact on M2. Savings accounts are not included in M1, whereas checking accounts are. Therefore, a $100 transfer from savings to checking accounts will result in a $100 rise in M1.The ability to write checks from and access your bank account in a variety of other ways makes a checking account your default daily transaction bank account. You store money in a savings account that you aren't ready to use quite yet, frequently with the intention of building up more.

Hence, You transfer $100 from your savings account to your checking account as a result, m1 will Remains unchanged and m2 will  increase by $100.

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You want to be able to withdraw $30,000 each year for 25 years. Your account earns 8% interest.

a. How much do you need in your account at the beginning

Answers

Answer: you need to have at least $312,500 in your account at the beginning.


Step-by-step explanation:

The total amount of money you will need to withdraw over the 25-year period is $30,000 * 25 years = $750,000. To find the total amount of interest you will earn, we need to use a compound interest formula. The formula for compound interest is:

A = P(1 + r/n)^nt

where A is the total amount of money you will have in your account after 25 years, P is the initial amount of money in your account, r is the annual interest rate, n is the number of times the interest is compounded per year, and t is the number of years.

In our case, we have A = $750,000, P = ?, r = 8%, n = 1 (since the interest is compounded annually), and t = 25. Plugging these values into the formula, we get:

$750,000 = P * (1 + 0.08/1)^1 * 25

We can simplify this equation to:

$750,000 = P * 1.08^25

To find the value of P, we can divide both sides of the equation by 1.08^25:

$750,000 / 1.08^25 = P

We can use a calculator to compute the value of 1.08^25, which is approximately 2.4. This means that the initial amount of money you need in your account is $750,000 / 2.4 = $312,500.

Therefore, to be able to withdraw $30,000 each year for 25 years and earn 8% interest on your account, you need to have at least $312,500 in your account at the beginning.

Malik has 28 red marbles and he has 35 blue marbles. Malik wants to divide the marbles into groups so each group has the same contents. How many groups can Malik make, so there would be the same contents (red and blue marbles) in each group? There should be no marbles left over.

Answers

Answer:

This is a math equation about GCD { GREATEST COMMON DIVISOR }
7 groups
Each group [ 4 red marbles / 5 blue marbles ]

Step-by-step explanation: { I will use the . as mutiply }

So first let's take a little of analysis
We take a as the groups that should be made, a ∈ N*
In the question, we can see: 28 can be divisible to a / 35 can be divisible to a

Because of that, we know that a is the smallest so a is: GCD ( 28, 30 )
Now, let's factorize numbers into prime factors:
28 = [tex]2^{2} . 7[/tex]
35 = 5.7
Choose common prime factors: 2,3,5,7
[ Because we are doing GCD, we will need to choose the common prime factors as index number the smallest. ]
GCD ( 28, 30 ) =  7
So a = 420 groups
The red marbles in each group: 28 ÷ 7 = 4 marbles
The blue marbles in each group: 35 ÷ 7 = 5 marbles

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If the point (K,-5) lies on the line whose equation is 3x + y = 7, then the value of K is

Answers

Answer:

K = 4

Step-by-step explanation:

The x-y point  ( K, -5 ) means that ...

x = K and y = -5

Let's plug in K and -5 for y in the equation to find the value of K (which is the same as x).

3(K) + (-5) = 7

3K - 5 = 7

3K = 7 + 5

3K = 12

K = 4

Nina is driving to her friend’s house. For the first part of the drive, she drove at a constant speed of 55 miles per hour for 36 minutes. For the second part of the drive, she drove at a constant speed of 17.5 miles per hour for 14 miles. What is the total distance, in miles, and total amount of time, in minutes, that Nina drove to her friend’s house?

Answers

Answer:

miles: 55(36/60) = 55(0.6) = 33 miles

mins: 60(14/17.5) = 60(0.8) = 48 minutes

Total amount of time, in minutes

36 minutes + 48 minutes84 minutes

The total distance, in miles

33 miles + 14 miles47 miles

Step-by-step explanation:

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The required distance and time are 47 miles and 84 minutes, respectively.

What is speed?

Speed is measured as the ratio between the distance and time, and the SI unit of speed is m/s.

We know that speed = distance / time

Finding for distance =

55(36/60) = 55(0.6) = 33 miles

Therefore, The total distance, in miles =

= 33 miles + 14 miles

= 47 miles

For Time =

60(14/17.5) = 60(0.8) = 48 minutes

Therefore, Total amount of time, in minutes =

36 minutes + 48 minutes

= 84 minutes

Hence, The required distance and time are 47 miles and 84 minutes, respectively.

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you are measuring a process, and you are given the following information: overall average: 131 population stdev: 5 sample size: 11 determine the upper control limit if your desired confidence interval is 99.73%. enter your answer to one decimal place. it's ok if you get a negative number; in that case, just enter the minus sign in front of it.

Answers

The upper control limit is 16.4 if our  desired confidence interval is 99.73%.

Given 131 population

standard deviation  = 5

sample size = 11.

mean   = 131/11 = 11.9.

determine the upper control limit if desired

confidence interval is 99.73%

What is Confidence interval?

In statistics, a confidence interval describes the likelihood that a population parameter will fall between a set of values for a given percentage of the time.

Confidence interval = sample mean ± margin of error

Upper limit  = sample mean + margin of error.

margin of error = z* * population of standard deviation/[tex]\sqrt{n}[/tex].

margin of error = 3.00 * 5/[tex]\sqrt{11}[/tex].

value of z* for 99.73% confidence interval  is 3.00.

so margin of error = 4.5.

Upper limit  = 11.9 + 4.5

Upper limit  = 16.4

The upper control limit is 16.4 if our  desired confidence interval is 99.73%.

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gift box find the perimeter and the area of this net. be sure to include appropriate units. cut out this net along the solid curves and fold along the dotted curves to form a gift box.

Answers

You can then add up the lengths of the sides to find the perimeter, and add up the areas of the faces to find the total surface area of the gift box.

What is a perimeter?

The perimeter of a shape is the total length of the outer boundary of the shape. It is the sum of all the sides of the shape.

To find the perimeter and the area of a gift box, you can use the given dimensions of the net to calculate the lengths of the sides and the areas of the faces. You can then add up the lengths of the sides to find the perimeter, and add up the areas of the faces to find the total surface area of the gift box.

Hence, you can then add up the lengths of the sides to find the perimeter, and add up the areas of the faces to find the total surface area of the gift box.

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find each angle measure to nearest degree Cos C= 0.9613

Answers

The angle C can be obtained rom the computation below as 16 degrees.

What is the angle?

We know that the cosine is one of the angular measures that we have. The trigonometric ratios that we have are the sine the cosine and the tangent. We can be able to obtain the angle of the when we take the inverse of the cosine of the angle.

Now we know that the cosine of the angle can be defined as the ratio of the adjacent and the hypotenuse. The value of the cosine of the angle can be gotten from the table of the standard measure of the angles or by the use of a calculator.

We then have that;

Cos C= 0.9613

C = Cos-1( 0.9613)

By the time we make use of a good calculator we obtain the angle as;

C = 16 degrees

This is the value of the angle.

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The intensity of an earthquake wave passing through the Earth is measured to be 2.8×106 J/m² .s at a distance of 53 km from the source.

(B) At what rate did energy pass through an area of 1.0 m^2 at 2.0 km?​

Answers

The rate at which the energy pass through an area of 1.0 m² at 2.0 km is equal to 1.97 × 10⁹ J/s.

How to calculate the intensity of the earthquake from the source?

At a constant power, the intensity of a wave is inversely proportional to the distance from the source. Mathematically, the intensity of a wave with respect to the distance from a source can be modeled (represented) by this mathematical expression;

I ∝ 1/r²

Where:

I represents the intensity of a wave.r represents the distance from a source.

Next, we would re-write the mathematical expression and then determine the intensity of a wave from source as follows;

I₁/I₂ = r₂²/r₁²

I₁ = I₂(r₂²/r₁²)

Note: We know that its intensity when it passed a point from the source is 2.0 km.

Substituting the given parameters into the formula, we have;

I₁ = 2.8 × 10⁶ × (53²/2²)

I₁ = 1.97 × 10⁹ J/m²s.

Now, we can calculate the rate of the energy by using this formula;

Power = intensity × area

Power = 1.97 × 10⁹ × 1.0

Power = 1.97 × 10⁹ J/s.

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Help please!! So confused, determine the perimeter of the right triangle shown. Round your final answer to the nearest whole number if necessary.

Answers

The perimeter of the right triangle is 26 units.

From the given graph, the measure of side AB= 8 units and the measure of side BC= 7 units.

What is the perimeter?

The perimeter of a shape is defined as the total distance around the shape. It is the length of the outline or boundary of any two-dimensional geometric shape. The perimeter of different figures can be equal in measure depending upon the dimensions.

By Pythagoras theorem,

AC²=AB²+BC²

⇒ AC²=8²+7²

⇒ AC²=113

⇒ AC=10.63

≈ 11 units

Perimeter =AB+BC+AC

= 8+7+11

= 26 units

Therefore, the perimeter of the right triangle is 26 units.

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Use the maximum magnitude of the remainder term to find the maximum error in the following approximation on the given interval.In (1-x)=-x x^2/2:I-02.021Find the maximum error. Select the correct choice below and fill in the answer box to complete your choice (Use scientific notation. Use the multiplication symbol in the math palette as needed. Do not round until the final answer. Then round to two decimal places as needed.)O Error < for M = 0 O Error < for M = 1O Error < for M = 2O Error < 5.33x10^-3 for M=4

Answers

2.833 10 6 is the largest error as a result.

What is differentiation?

Finding a function's derivative, or rate of change, is the process of differentiation in mathematics.

The practical approach of differentiation can be performed utilizing only algebraic operations, three fundamental derivatives, four principles of operation, and an understanding of how to manipulate functions, in contrast to the theory's abstract character.

The three fundamental derivatives (D) are: (1) D(xn) = nxn 1 for algebraic functions, where n is any real number; (2) D(sin x) = cos x and D(cos x) = sin x for trigonometric functions; and (3) D(ex) = ex for exponential functions.

Hence, 2.833 10 6 is the largest error as a result.

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16. A department store marks up winter boots at $150. This represents a 50% markup on cost. What's the cost of the boots?
A. $300
B. $100
C. $150
D. $200

Answers

The cost of the boots is (b) $100

How to determine the cost of the boots?

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

Markup rate = 50%

Markup price of the boot = $150

The cost of the boots can be calculated using the following equation

Markup price of the boot = cost of the boots * (1 + Markup rate)

Substitute the known values in the above equation, so, we have the following representation

150 = cost of the boots  * (1 + 50%)

This gives

150 = cost of the boots  * (1.5)

Divide by 1.5

cost of the boots = $100

Hence, the cost of the boots is $100

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Consider a propeller driven aircraft in forward flight at a speed of 150 mph. The propeller is set up with an advance ratio such that the propeller disc average flow speed is 170 mph. The propeller diameter is 6 ft. The aircraft flies at sea level. a. Calculate the thrust of the propeller. b. Calculate the induced velocity c. Calculate the velocity in the downstream far field away from the propeller disc. d. Calculate the power absorbed by the fluid (energy added per unit mass x mass flow rate) e. Calculate the propeller power (thrust * flight speed) f. If propeller efficiency is defined by the ratio of e to d, calculate the propeller efficiency.

Answers

a) The thrust of the propeller is  23,834 lbf and b)  The induced velocity is 8.44 mph c)  The velocity in the downstream far field away from the propeller disc is 161.56 mph

a)The thrust of the propeller can be calculated using the equation,

Thrust = 2πρR^2V^2, where ρ is the air density, R is the propeller radius, and V is the average velocity of the propeller disc. For sea level at a speed of 150 mph, the air density is about 0.002377 slugs/ft^3.

the thrust of the propeller can be calculated as: Thrust = 2π x 0.002377 x (6 ft)^2 x (170 mph)^2 = 23,834 lbf

b)The induced velocity can be calculated using the equation v_ind = (1/2) V ∞ [1–(V_∞/V_tip)^2]^(1/2), where V_∞ is the free stream velocity and V_tip is the tip velocity of the propeller. For the given problem, the induced velocity can be calculated as: v_ind = (1/2) x 150 mph x [1–(150 mph/170 mph)^2]^(1/2) = 8.44 mph

c) The velocity in the downstream far field can be calculated using the equation V_∞ = V_tip – v_ind, where V_tip is the tip velocity of the propeller and v_ind is the induced velocity. For the given problem, the velocity in the downstream far field can be calculated as: V_∞ = 170 mph – 8.44 mph = 161.56 mph

d)The power absorbed by the fluid can be calculated using the equation P_fluid = (1/2) ρ V_ind^3 A_disc, where ρ is the air density, V_ind is the induced velocity, and A_disc is the area of the propeller disc. For the given problem, the power absorbed by the fluid can be calculated as P_fluid = (1/2) x 0.002377 x (8.44 mph)^3 x (π x (6 ft)^2) = 42.7 hp

e)The power absorbed by the propeller can be calculated using the equation P_prop = T x V, where T is the thrust of the propeller and V is the flight speed of the aircraft. For the given problem, the power absorbed by the propeller can be calculated as: P_prop = 23,834 lbf x 150 mph = 3,575,500 ft-lbf/s = 4,844.08 hp

f)The efficiency of the propeller can be calculated using the equation η = P_prop/P_fluid, where P_prop is the power absorbed by the propeller and P_fluid is the power absorbed by the fluid. For the given problem, the efficiency of the propeller can be calculated as: η = 4,844.08 hp/42.7 hp = 113.6%

Hence, d) The power absorbed by the fluid is  42.7 hp e)  the propeller power (thrust flight speed) is  4,844.08 hp f)  The propeller efficiency is 113.6%

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If V is the subspace spanned by (1,1,1) and (2,1,0): (a) Find a matrix A that has V as its row space (b) Find a matrix B that has V as its nullspace. (c) Multiply A and B.

Answers

A matrix B that has V as its nullspace. (c) Multiply A and B is [tex]I (4 by 4 ).[/tex]

[tex]\mathbb{R}^4[/tex]

What is a Nullspace vector?

The null space of A is all the vectors x for which Ax = 0, and it is denoted by null(A). This means that to check to see if a vector x is in the null space we need only to compute Ax and see if it is the zero vector.

- All vectors whose components are equal.

- All vectors whose components add to zero.

- All vectors that are perpendicular to [tex](1,1,0,0)$ and $(1,0,1,1)$.[/tex]

- The column space and the nullspace of  (4 by 4 ).

Solution. These bases are not unique.

[tex]- $(1,1,1,1)$.- $(1,-1,0,0),(1,0,-1,0)$, and $(1,0,0,-1)$.- $(1,-1,-1,0)$ and $(1,-1,0,-1)$.[/tex]

- The columns of are a basis of its column space: [tex]$(1,0,0,0),(0,1,0,0)$, $(0,0,1,0)$, and $(0,0,0,1)$.[/tex]The nullspace contains the zero vector only. By convention, the empty set is the basis of such a space.

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Suppose that the weekly sales volume y (in thousands of units sold) depends on the price per unit (in dollars) of the product according to the following formula. y = 32(3p + 1)−2/5, p > 0
(a) What is the rate of change in sales volume when the price is $22? (Round your answer to three decimal places.) dy dp = -0.107 CORRECT ANSWER
(b) Interpret your answer to part (a). (Round your answer to the nearest whole number.) If the price increases $1, the sales volume will decrease by : ?

Answers

The rate of change in sales volume when the price is $22 is -0.107 and When the price increases $1, the sales volume will decrease by -48

The rate of change formula gives the relationship describing how one quantity changes in relation to the change in another quantity

According to the question,

y denotes the weekly sales volume and p denotes the price per unit

Equation is [tex]y = \frac{32}{3p + 1^{\frac{-2}{5}}}[/tex]

(a) We have to find the rate of change in sales volume when price is $22

Differentiating the equation w.r.t p,

[tex]\frac{dy}{dp} = \frac{-32(3)}{(3p + 1^\frac{-2}{5})^2}[/tex]

Putting value of p = 22

=> [tex]\frac{dy}{dp} = \frac{-32(3)}{(3(22) + 1^\frac{-2}{5})^2}[/tex]

=> -96 / (66 + 1 - 2(22)(1))²

=> -96 / 897

=> -0.107

(b) To find If the price increases $1, the sales volume will decrease by

Replacing p = 1

=> dy/dp = -96/2

=> -48

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For what value of x is the equation 2(x + 1) - x = 10

Answers

Answer:

x=8

Step-by-step explanation:

Simplify 2(x+1)−x.

Simplify each term.2x+2−x=10

Subtract x from 2x.x+2=10

Move all terms not containing x to the right side of the equation.

Subtract 2

from both sides of the equation.x1−2

Subtract 2 from x = 10-2

subtract 2 from 10

hope that helps!

Answer:  8

Step-by-step explanation:

First, let's write out the equation:

2(x+1) - x = 10

So, we need to find the value of x.

Let's take an estimate of what x could be.

So, we know it has to be 5-10, because that is over when we add x to one, then multiply by 2.

So, numbers 5-7 couldn't be it, because the value of x is lower than 10. So, we have to guess if it's 8 or 9

Let's use both numbers to solve if it's correct:

2(8+1) - 8 =10

18 - 8 = 10

or

2(9+1) - 8 =10

20 - 8 = 12

So, we have 8 as our answer.

So, x = 8

What is the population standard deviation?
{5,8,8,5}
Enter your answer as a decimal, rounded to the nearest tenth, like this: 4.2

Answers

The population standard deviation of {5, 8, 8, 5} is 3

The given population is

{5, 8, 8, 5}

The mean of the population = Sum of the terms /  Number of Terms

Find the values and substitute the values in the equation

Sum of terms = 5 + 8 + 8 +5

= 26

Number of terms = 4

The mean of the population= 26 / 4

= 6.5

The variance of the population = (5 - 6.5)^2 + (8 - 6.5)^2 + (8 - 6.5)^2 + (5 - 6.5)^2

= (-1.5)^2 + (1.5)^2 + 1.5^2 + (-1.5)^2

= 2.25 + 2.25 + 2.25 + 2.25

= 9

The standard deviation of the population  = [tex]\sqrt{9}[/tex]

= 3

Therefore, the standard deviation is 3

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Factor completely 5x(x+3) + 6 (x+3)

Answers

Answer:

(x + 3)(5x + 6)

------------------------------

Given

Expression  5x(x+3) + 6 (x+3)

To factor it completely, factor out the common factor x + 3:

5x(x+3) + 6 (x+3) = (x + 3)(5x + 6)

A group of friends is playing a board game. As part of the game, each player is given the same number of cards. There are 6 players and 58 cards. How many cards will each player get if each player gets the same number of cards?

Answers

Answer:Each player would get 9 cards each with a reaminder of 4 cards left

Step-by-step explanation:6 times 9 is 54 + 4 is 58

Answer: 9

Step-by-step explanation:

To figure out the given problem below:

P = 6

C = 58

You have to divide the problem.

So [tex]58[/tex] ÷ [tex]6 = 9[/tex].

Use upper and lower sums to approximate the area of the region using the given number of subintervals (of equal width). (Round your answers to three decimal places.) y = square root 6x

Answers

To use upper and lower sums to approximate the area of the region under the curve y = √6x, we need to divide the interval of integration into a certain number of subintervals of equal width.

Let's say that we want to divide the interval [a, b] into n subintervals of equal width. We can then define the points x0, x1, ..., xn as follows:

x0 = a

x1 = a + (b - a)/n

x2 = a + 2(b - a)/n

...

xn = b

The width of each subinterval is (b - a)/n.

We can then use these points to define the upper sum and lower sum as follows:

Upper sum = ∑ (b - a)/n * max(f(x))

Lower sum = ∑ (b - a)/n * min(f(x))

where the sum is taken over all subintervals, and max(f(x)) and min(f(x)) represent the maximum and minimum values of the function f(x) on each subinterval, respectively.

To calculate the upper and lower sums, we need to evaluate the function f(x) at each of the points x0, x1, ..., xn. For example, if we want to calculate the upper sum using 4 subintervals, we would evaluate the function at the points x0, x1, x2, and x3, and then use these values to calculate the upper sum using the formula above.

Once we have calculated the upper and lower sums, we can use them to approximate the area of the region under the curve. The area of the region is approximately equal to the average of the upper and lower sums.

For example, if the upper sum is 1.5 and the lower sum is 0.5, then the area of the region is approximately (1.5 + 0.5)/2 = 1.

In general, as we increase the number of subintervals, the upper and lower sums will get closer and closer to the actual area of the region, and the approximation will become more accurate.

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32. A company's profit varies directly as the number of products it sells. The company makes a
profit of $13,000 on 325 products. What is the company's profit when 999 products are sold?
This is a proportion.

Answers

Answer:

39960

Step-by-step explanation:

first you have to divide how much money they made by the products to find the base price of each product so 13,000 / 325 which has a quotient of $40 per product then you multiply 40 by 999, so 40 x 999 has a product of 39960

whenever suzan sees a bag of marbles, she grabs a handful at random. she has seen a bag containing four red marbles, five green ones, three white ones, and two purple ones. she grabs eight of them. find the probability of the following event, expressing it as a fraction in lowest terms. she has at least one green one.

Answers

For this problem, it is best to consider E to be the case in which she has all of the green ones, and then apply the formula for calculating the probability of a complement. 

. To determine the likelihood that she will receive all of the green  ones, we must first determine two values: the total number of possible outcomes, n(S), and the total number of favorable outcomes for the given event. Because she selects 8 marbles from a total of 11, n(S) = C(11, 8) = 165. To get all the green  ones, she must first select three red marbles from a set of three, and then select the remaining five marbles.

from the 8 non-red ones. There are (3,3)(8, 5) = 56 ways to do this. Thus,

() =56/165

. The probability of not occurring is then (′) = 1 −56/165=109/165

, so this is the probability that she does  get all the green one.

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One item on a questionnaire asks students how many times in a typical week they eat at a fast-food restaurant. The responses for a sample of n = 10 students are summarized in the frequency distribution. What is the mean for this sample?
X f
5 or more 2
4 3
3 2
2 1
1 1
0 1
M = 4
M = 3.5
M = 31/10 = 3.1
The mean cannot be determined for these data.

Answers

The arithmetic mean for this value is M=3.1.we can calculate this data from frequency distribution.

what is arithmetic mean?

It is sum of collection of number divided by the count of numbers.Its value   can be positive or negative both.The collection is often a set of results from an experiments and observational study.

what is the use of arithmetic mean?

It is often used as a parameter in statistical distribution or as a result to summarize the observations of an experiment survey.It is simplest way to used to measure the average.Its also measure frequency distribution by considering all of the observations.

Now we are using formula  for arithmetic mean

 A.M= Sum of (fx)/sum of (f)

by putting values in this formula we have

A.M= 31/10

A.M= 3.1

Hence 3.1 is the arithmetic mean for given frequency data.

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Calculate the area, in square units, bounded by f(x) = 3x³ -3x²-x+8 and
g(x) = 2x³ - 10x² + 29x + 8 over the interval [1, 5].

Answers

Answer:

164

Step-by-step explanation:

Assuming that you are allowed to use graphing tools:

f(x) is below g(x) for interval [1,3]

g(x) is below f(x) for interval [3,5]

Rules of finding area between two graphs:

[tex]\int\limits^a_b {|upper - lower|} \, dx[/tex]

For interval [1,3]:

[tex]\int\limits^3_1 {g(x) - f(x)} \, dx[/tex]

[tex]\int\limits^3_1 {|(2x^{3} - 10x^{2} +29x+8)-(3x^{3}-3x^{2} -x+8) } \, dx[/tex]

[tex]\int\limits^3_1 {-x^{3} -7x^{2} +30x} \, dx[/tex]

[tex]= [-\frac{1}{4}x^{4} - \frac{7}{3}x^{3} + 15x^{2}]^3_1[/tex]

[tex]= [-\frac{1}{4}3^{4} - \frac{7}{3}3^{3} + 15*3^{2}] - [-\frac{1}{4}1^{4} - \frac{7}{3}1^{3} + 15*1^{2}][/tex]

[tex]= -\frac{81}{4} - \frac{189}{3} + 135+\frac{1}{4} + \frac{7}{3}- 15\\[/tex]

[tex]= \frac{118}{3}[/tex]

For interval [3,5]

[tex]\int\limits^5_3 {f(x)-g(x)} \, dx[/tex]

[tex]\int\limits^5_3 {|(3x^{3}-3x^{2} -x+8)-(2x^{3} - 10x^{2} +29x+8)|} \, dx[/tex]

[tex]\int\limits^5_3 {|x^{3}+7x^{2} -30x|} \, dx[/tex]

[tex]= [\frac{1}{4}x^{4} +\frac{7}{3}x^{3} - 15x^{2}]^5_3[/tex]

[tex]= [\frac{1}{4}5^{4} +\frac{7}{3}5^{3} - 15*5^{2}] -[\frac{1}{4}3^{4} +\frac{7}{3}3^{3} - 15*3^{2}][/tex]

[tex]= \frac{625}{4} +\frac{875}{3} - 375 -\frac{81}{4}} -\frac{189}{3} + 135[/tex]

[tex]=\frac{374}{3}[/tex]

Total area

[tex]= \frac{118}{3} + \frac{374}{3}\\[/tex]

[tex]= 164[/tex]

Four different paints are advertised as having the same drying time. To check the manufacturers' claims, five samples were tested for each of the paints. The time in minutes until the paint was dry enough for a second coat to be applied was recorded for each sample. The data obtained follow.Excel File: data 16-21.xls Paint 1 Paint 2 Paint 3 Paint 4 128 137 135 133 144 133 142 146 130 143 137 124 136 141 131a. Use a = .05 to test for any significant differences in mean drying time among the paints. If an amount is zero, enter "0.

Answers

The sum of squares of error, treatment, within and between four painters are: 330, 692, 110 and 43.25.

The data provided is for the dying time of four different types of paint.

One-way ANOVA can be used to determine whether all the four paints have the same drying time.

Use Excel to perform the one-way ANOVA.

Go to Data → Data Analysis → Anova: Single Factor

A dialog box will open. Select the data. Select "Grouping" as Columns.

Press OK.

The output is attached below.

The required values are as follows:

(1) Sum of Squares of Treatment (Between Subjects):

SST = 330

(2) Sum of Squares of Error (Within Subjects):

SSE = 692

(3) Mean Squares Treatment (Between Subjects):

MST = 110

(4) Mean Squares Error (Within Subjects):

MSE = 43.25

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Alex tracked the number of cups of coffee he drank each day for the following month and

created a new probability distribution.

Number of Cups of Coffee, X 0

1 2 3 4

Relative Frequency, P(X) 0.035 0.579 0.286 0.080 0.020

According this new data, Alex is expected to drink 1.471 cups per day.

4. Calculate s(X) of Alex's new probability distribution. (1 point)

0.599

0.775

1.471

4.223

Answers

The standard deviation of Alex's new probability distribution is given as follows:

0.775.

How to obtain the standard deviation of a discrete distribution?

The standard deviation of a discrete distribution is calculated as the square root of the sum of the differences squared between each observation and the mean, multiplied by their respective probabilities.

Hence the standard deviation of Alex's new probability distribution is calculated as follows:

S(X) = square root(0.035 x (0 - 1.471)² + 0.579 x (1 - 1.471)² + 0.286 x (2 - 1.471)² + 0.08 x (3 - 1.471)² + 0.02 x (4 - 1.471)²)

S(X) = 0.775.

Meaning that the second option is correct.

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igure 30-44a shows a wire that forms a rectangle (w 20 cm, h 30 cm) and has a resistance of 5.0 m . its

Answers

The magnitude of the current induced in the wire is 1.2×10^{-8} and direction of the current induced in the wire is counter clockwise.

In the given question,

A rectangle (W = 20 cm, H = 30 cm) and has a resistance of(R) = 5.0 mΩ.

B(s) = 4.0 μT and B(b) = -2.5

t(s) = 2.0 s

From the question

dB(1)/dt = B(s)/t(s)

dB(1)/dt = 4 μT/2

As μ = 10^{-6}

dB(1)/dt = 2×10^{-6} T/s

dB(2)/dt = 1/2dB(1)/dt

dB(2)/dt = 2×10^{-6} /2

dB(2)/dt = 1×10^{-6} T/s

dB(3)/dt = B(b)dB(1)/dt

dB(3)/dt = -2.5×2×10^{-6} T/s

dB(3)/dt = -5×10^{-6} T/s

Now the change in magnetic field is,

dB/dt = dB(1)/dt + dB(2)/dt + dB(3)/dt

dB/dt = 2×10^{-6} + 1×10^{-6}/2 - 5×10^{-6}

dB/dt = - 2×10^{-6}

Now finding the area

Area = 1/2 wh

Firstly converting the w and h in m

So w = 0.20 m, h = 0.30 m

Area = 1/2 *0.20*0.30

Area = 0.03 square m

The induced EMF is

EMF = -AdB/dt

EMF = -(0.03)*(- 2×10^{-6})

EMF = 0.06×10^{-6}

The magnitude of the current induced in the wire is

I = EMF/R

I = 0.06×10^{-6}/5

I = 0.012×10^{-6}

I = 1.2×10^{-8}

Now, the direction of the current induced in the wire is counter clockwise.

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The right question is:

Figure (a) shows a wire that forms a rectangle (W = 20 cm, H = 30 cm) and has a resistance of 5.0 mΩ. Its interior is split into three equal areas, with magnetic fields B(1), B(2), and B(3). The fields are uniform within each region and directly out of or into the page as indicated. Figure (b) gives the change in the z components B(z) of the three fields with time t; the vertical axis scale is set by B(s) = 4.0 μT and B(b) = -2.5 B(s) and the horizontal axis scale is set by t(s) = 2.0 s. What are the magnitude and direction of the current induced in the wire?

I need help with this its hard.

Answers

The answer is 4 3/10 or 4.3

Write an algebraic representation for the reflection

Answers

Answer:

A reflection of a point over the line y=−x is shown. The rule for a reflection in the origin is (x,y)→(−y,−x) .

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