i only need help with 12 & 13 only and show work please. note the picture is sideways​

We have that

The parts the will be rejected when it's above 95 or when it's under 85, if we plot the normal distribution it would be

Then, the percentage of the parts that will be rejected corresponds to the area in blue, then, we must calculate the area under the normal distribution for

The normal distribution is symmetrical, then calculate P(X < 85) is the same as P(X > 95), then we write it as

Calculate that integral is very hard, then, we must transform that in a standard normal X ~ N(0, 1) and use a table to find the result, to do that we must write a value z, it's a transformation to take a value on our normal and leads it to the standard normal, it's

We have X = 95, μ = 90 and σ = 2

Then 2.5 is the value we are going to search in our table, using the complementary cumulative table for 2.5 we get 0.00621, which means

And the total percentage will be

We can write it in percentage

Therefore, only 1.24% will be rejected.

It's a very low value, but it's expected because it's more than 2 standard deviations (95%).

There are 13 $20 bills and 17 $10 bills, respectively.

Constants and variables are used in conjunction to create linear equations. A linear equation with one variable is shown in the following standard form: Where a 0 and x is the variable, ax + b = 0.

Due to that,

There are 30 bills in all.

Total = $430

Let,

x = the number of $20 bills.

Amount in $10 banknotes = (30-x)

20x+10(30-x) = 430

20x+300-10x = 430

10x = 430-300

10x = 130

x = 13

$20 bills: x = 20; y = 13.

30 x = 30 13 = 17 = number of $10 banknotes

Therefore, there are 13 $20 bills and 17 $10 banknotes.

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Given: The square STUV

To Determine: The coordinate of the image after reflection over the y-axis

Solution

The reflection over the y-axis rule is

Locate the coordinates of STUV

Let us apply the rule to get the coordinate of the image

Hence, the coordinate of the image after a reflection over the y-axis is

S'(10, - 10)

T'(0, - 10)

U'(0, 0)

V'(10, 0)

Answer:

28 N/m²

Step-by-step explanation:

Since you are calculating pressure, you want your question in N/m².

Note that the one side of the box has a length of 1.5m, and so to get the area of the bottom face, you need to square 1.5m::

(1.5m)² = 2.25m²

Then you need to use the formula P=F/A

Where P is pressure, F is force, and A is area, plug in your variables::

P = [tex]\frac{63N}{2.25m^{2} }[/tex]

Then you get an answer of:[tex]28 \frac{N}{m^{2} }[/tex]

You always want to make sure that the answer's units align with what you are told to solve for. In this case, they do, so no further steps are needed.

Hope this helps! :)

Answer:

y = kx

Step-by-Step explanation:

An equation shows a proportion relationship when it can be written in the following format:

So, in the context of this exercise, we need to pass x to the other side of the equation dividing, by itself.

In this question:

y = k+x

x alone cannot be passed dividing, just k+x

Y = k, there is no x.

The answer is y = kx, because we can also write this as:

It will take 1 minute to tub to drain to his desired level, by Rate of change.

What is rate of change?

Rate of change is used to mathematically describe the percentage change in value over a defined period of time.

Given, starting water value = 42 and desired water level = 28

Rate of change = 14 gallons.

Let x be the time,

According to question,

42-14x=28

-14x=-14

x=1

Hence, it will take one minute.

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cos90° is equal zero

The average rate of change in population is -35 between 2002 and 2004, and -2.5 between 2002 and 2006 which represents the decrease in the population.

Lagrange mean value theorem states that, if a function f is continuous over the closed interval [a, b] and differentiable over the open interval (a, b), then there must be at least one point c in the interval (a, b) where the slope of the tangent at the point c is equal to the slope of the tangent through the curve's endpoints, resulting in the expression f'(c) = {F(b) -F(a)}/(b-a)

As per the given data in the table, the required solution would be below

The average rate of change in population between 2002 and 2004 as:

⇒ (76-83)/(2004-2002)

⇒ -7/2

⇒ -3.5

The average rate of change in population between 2002 and 2006

⇒ (78-83)/(2006-2002)

⇒ -5/2

⇒ -2.5

This represents the decrease in the population.

Therefore, the average rate of change in population is -35 between 2002 and 2004, and -2.5 between 2002 and 2006.

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We have the function that relates x and y expressed as:

a) We have to find the x-intercepts.

To do that we can use the quadratic equation:

Then, we have x-intercepts at x = -1 and x = 3.

b) We have to find the vertex.

We can find the x-coordinate of the vertex using the linear coefficient b = -0.4 and the quadratic coefficient a = 0.2:

It can also be calculated as the average of the x-intercepts.

Knowing the x-coordinate of the vertex, we can find the y-coordinate of teh vertex using the formula applied to x = 1:

Then, the vertex is (1, -0.8).

c) The minimum height will be given by the y-coordinate of the vertex.

Relative to the horizontal axis (y = 0), the minimum height will be -0.8 meters below that level.

Answer:

a) The x-intercepts are x = -1 and x = 3.

b) The vertex is (1,-0.8)

c) The minimum height is 0.8 units below the horizontal axis.

Problem Statement

The question tells us that the GMAT scores are approximately normally distributed with a mean of 547 and a standard deviation of 95.

We are asked to find the percentage of scores that were:

a) between 357 and 737.

b) above 737

c) below 452

d) between 452 and 737.

Solution

a) Between 357 and 737:

b) Above 737

c) Below 452:

d) Between 452 and 737:

The volume of box will be 120 ft.³

What is volume ?

Volume is a three dimensional space occupy by the body of particular shape such as here :

Volume of cuboidal box = lbh

where, length "l" = 4 ft.

width "b" =  5 ft.

height "h" = 6 ft.  

now, the volume of box will be :

V = lbh

V = 4 x 5 x 6

V = 120 ft.³

Therefore, the volume of box will be 120 ft.³

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Answer:

Step-by-step explanation:

Answer: The answer is 570.

Step-by-step explanation:

So, if you know what numbers are, when you round, this question is easy. If you take a number line and put 570 on the left side and 580 on the right side, and 575 in the middle, you almost got it. Since the number we want to round is 573, we put it in the middle of 570 and 575. And since the number is closer to 570 than 580, the answer is 570. Your welcome!

Answer:

c. $16,092

Explanation:

• Fay is paid semimonthly, that is, ,twice a month,.

• There are ,12 months in a year,.

Thus, the number of paychecks she receives annually is: 2 x 12 = 24.

The net amount of each paycheck is $670.50.

In order to get her net annual income, multiply the net amount on each paycheck by the number of payments.

Fay's net annual income is $16,092.

Option C is correct.

The amount of money donated by Jacy is $10.

Given that, Jacy made the first donation Gillermo’s donation was twice Jacy’s donation Rosa’s mother tripled what Aurora had raised so far now Aurora has $120.

In mathematics, an equation is a formula that expresses the equality of two expressions, by connecting them with the equals sign =.

Let the donation given by Jacy be $x.

Divide that amount by 4. One part is Guillermo's and Jacy's donation and three parts is the amount donated by Rosa's mother = 120 ÷ 4 = $30

Divide that amount by 3. One part is for Jacy's donation ($x) and two part is the amount Guillermo donated x = 30/3 = $10

Jacy was the first to donate. So, Jacy donated is $10

Therefore, the amount of money donated by Jacy is $10.

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The value of b would be 25/4.

An equation is an expression that shows the relationship between two or more numbers and variables.

Since the equation of the line is 2y = 4.5, where c is a constant, the y-coordinate of the intersection point must be c.

The parabola has a equation y = -4x² + bx, where bis a positive constant.

The solution to this quadratic equation will gives the x-coordinate(s) of the point(s) of intersection

Since it’s given that the line and parabola intersect at exactly one point, the equation y = -4x² + bx has exactly one solution.

A quadratic equation in the form ax²+bx+c has exactly one solution when its discriminant b²−4ac is equal to 0.

Therefore, if the line y = 22.5 intersects the parabola defined by exactly one point, then by = 25/4 .

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There is a 0.765 percent chance that the flight will leave on time when it is not raining.

Gonna determine how likely something is to occur, use probability. Many things are hard to predict with 100% certainty. We can only anticipate the possibility of an event occurring using it, or how likely it is. In the probability scale, 0 indicates an impossibility and 1 indicates a certainty.

Given a 0.1 delay probability, the probability of the airplane departing on time is 1-0.1 = 0.9.

The likelihood that it won't rain is 1-0.15 = 0.85.

If it weren't raining, there is a 0.9 (0.85) = 0.765 percent chance that a flight would leave on time.

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Finding the derivative of the function is just a way for us to discuss how the function changes. For example, if we want to get the derivative of function y, with respect to x (dy/dx), then it is a formal way of discussing, how y changes when x changes.

total number of outcomes = 2 + 3 + 5 = 10

The probability of getting a white marble is:

The probability of getting a green marble is:

The events: getting a white marble and getting a green marble are independent since there is a replacement after each drawing. Then, the probability that the first marble was white and the second was Green is:

Using the area of a triangle, the area of Mr. Knox's garden is: 58 square feet.

The area of any triangular shape can be calculated using the formula for the area of a triangle.

The area of a triangle = 1/2(base)(height).

The shape of Mr. Knox's garden is triangular. The parameters of his triangular garden are:

Length of the base of the triangular garden = 24½ ft

Height of the triangular garden = 8 ft.

Area of the garden = 1/2(24½)(8)

Area of the garden = 1/2(29/2)(8)

Area of the garden = 1/2(232/2)

Area of the garden = 232/4

Area of the garden = 58 square feet.

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The least multiple of a number is itself.

Least multiple of 8 : 8

1) To find when the object strikes the ground, we need to find the roots of the equation. Using quadratic formula:

t can't be negative, then the object strikes the ground after 5.2 seconds

2) The maximum height is the vertex of the parabola. The t-coordinate is computed as follows:

It takes 1.87 seconds for the object to get to its maximum height

3) To find the height after 3.32 seconds, we have to replace t = 3.32 int the equation:

The height was 43.746 meters

5.1 is greater than 5.099, because the value of the 1 in 5.1 is more than the value of the 99 in 5.099.

The value of 1 in 5.1 is 0.1, while the value of the 99 in 5.099 is 0.099.

Since 0.1 is bigger than 0.099, then 5.1 is bigger than 5.099.

Also, 5.1 is greater than 5.099 because a bigger number on 5.1 (which is 1) is closer to the decimal point compared to 5.099 (1 is bigger than 0). the closer a decimal is to the decimal point the higher its value.

Answer:

x*9 = 3

that's all

=)

Answer:

x*9=3

Step-by-step explanation:

Atleast I think so

A. The depletion rate is $0.90 per ton.

B. The amount of depletion expense that Hidden Hollow Mining Co. should recognize for the current year is $15,345,000.

C. The adjusting journal entry to recognize the depletion expense is as follows:

Debit Depletion Expenses $15,345,000

Credit Accumulated Depletion $15,345,000

Adjusting entries are the journal entries made at the end of the accounting period to recognize unrecorded expenses, revenue, and other gains or losses.

An example of an adjusting entry is the entry to recognize depreciation, amortization, or depletion expenses.

The value of the mineral rights = $49,500,000

The estimated mineral deposit = 55,000,000 tons

Depletion rate = $0.90 per ton ($49,500,000/55,000,000)

The current year's tons mined and sold = 17,050,000 tons

Amount of depletion expense for the current year = $15,345,000 (17,050,000 x $0.90)

Depletion Expenses $15,345,000 Accumulated Depletion $15,345,000

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Answer:

Explanation:

First, the function, g(x):

The function g(x) oscillates, thus, it does not increase.

The value of 'e' is approximately 2.7.

Since 2.7 is greater than 2.5, we can infer that f(x) grows the fastest as x grows without bound.

To get the surface area of the prism given, we have to find the total area of the nets

We first split the nets into three and then find the areas

Lets us start with B

Area of A and C are equal

so each of the areas is

But we can use a general formula for an equilateral traingular prism

Thus we have the total surface area to be approximately

We can calculate the slope using the next formula

where

(1,-5)=(x1,y1)

(4,1)=(x2,y2)

We substitute the values into the formula above

the slope of the line is m=2, the answer is D

Answer:

$372

Explanation:

From the given problem, we have the following:

• The amount deposited, Principal = $1,550

• The interest rate, r = 4%

• Time = 6 years

To determine the amount of interest earned, at simple interest, we use the formula below:

Substitute the given values:

The interest that was earned in 6 years is $372.

Answer:

The answer is be because the x dose not repeat

Step-by-step explanation:

the x dose not repeat just look for the non repeating x