Please help i really need help with this one

9.
about 5/7 of the earth's surface is covered with water.
about 88 957 440 km squared is land. in km², about how
much of the earth's surface is covered with water?

The ratio of boy to girl who play kickball at race is 6 to 2. There are 18 girl on the team. the number of boys who play kickball at race is 12 boys.

The ratio of boy to girl who play kickball at race is 6 to 2

6 boys: 2 girls

Multiply the number of girls by the ratio:

18 girls x (6 boys / 2 girls) = 18 x 3 = 54

Subtract the number of girls from the total to get the number of boys:

54 - 18 = 36

Therefore, there are 12 boys who play kickball at race.

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The probability that Alice has two Aces is 5.88%.

To answer your question about the probability that Alice has two aces, we will consider the two scenarios you provided.

1. If you know that Alice has an Ace:

- There are 52 cards in a standard deck, and 4 Aces.
- Since Alice has an Ace, she has one of the 4 Aces and 51 cards remain in the deck.
- There are now 3 Aces left in the deck, and Alice needs one more Ace to have two Aces.
- The probability that Alice has two Aces is the number of remaining Aces divided by the number of remaining cards, which is 3/51.

2. If you know that Alice has the Ace of Spades:

- Since Alice has the Ace of Spades, there are now 51 cards left in the deck.
- There are still 3 Aces remaining (hearts, diamonds, and clubs).
- The probability that Alice has two Aces is the number of remaining Aces divided by the number of remaining cards, which is 3/51.

In both scenarios, the probability that Alice has two Aces is 3/51, or approximately 0.0588 or 5.88%.

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Answer:

421.35

Step-by-step explanation:

Answer:

$1.75  cost of the funnel cake and $4.25 cost of the ice cream cone.

Step-by-step explanation:

x = cost of the ice cone cone

y = cost of the funnel cake

3x + 4y = 19.75      multiply (-2)       ⇔     -6x - 8y = -39.50

5x + 8y = 35.25    do not change   ⇔  +  5x + 8y = 35.25

                                                                     -x  =  -4.25

                                                                      x = 4.25  cost of the ice cream cone

Substitute into the second equation x = 4.25 and solve  for y

5(4.25) + 8y = 35.25

21.25 + 8y = 35.25

  8y = 14

y = 1.75    cost of the funnel cake

the probability that the hand contains at least 3 cards of every suit is 0.4214

The probability is computed by dividing the total number of possible outcomes by the number of possible ways the event might occur. Probability and odds are two distinct ideas. Odds are calculated by dividing the likelihood of an event by the likelihood that it won't.

Classical: (equally probable outcomes) (equally probable outcomes) Let S be the sample space (the collection of all unique outcomes that might occur).

Subjective Probability. Definition of Relative Frequency.

the probability that the hand contains at least 3 cards of every suit is 0.4214

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Answer:

See below

Step-by-step explanation:

GCF of 36 and 4   is    welllll,    just  4

so 36 - 4    =     4*9 - 4 =   4 ( 9-1)       ( I THINK that is what goes here)

Well the distance from the two points is 15 so that means the midpoint in -10+7.5=-2.5. There you go! Have a nice day.

Answer:

Given the expression x2 + 16x.

If the quadratic equation is of the form ax2 + bx + c then to complete square

Step1: Take coefficient of x2 common from ax2 + bx + c,

⇒ a[x2 + (b/a)x + (c/a)]

Step2: Add and subtract (1/2 coefficient x)2 to quadratic term then,

⇒ a [(x + 1/2 coefficient x)2) + (c/a) - (1/2 coefficient x)2

⇒ a [(x + b/2a)2 + c/a - (b/2a)2]

Note that if the coefficient of x2 is 1 then we have to add (1/2 coefficient x)2 to convert it into perfect square expression.

Thus, in the given problem x2 + 16x.

1/2 coefficient of x = (1/2) × 16 = 8

We have to add 82 = 64, to convert it into a perfect square.

Therefore, 64 must be added to the expression to make it a perfect-square trinomial.

Answer:

x = 24

Step-by-step explanation:

if a and b are parallel then

62 and 5x - 2 are same- side interior angles and sum to 180° , that is

5x - 2 + 62 = 180

5x + 60 = 180 ( subtract 60 from both sides )

5x = 120 ( divide both sides by 5 )

x = 24

thus for a to be parallel to b , then x = 24

Answer:

slope =4

Step-by-step explanation:

from, y=mx + c

where m is slope

Answer:

the slope formula is y=mx+b where b is the y intercept and m is the slope we rewrite the equation by subtracting 4x from either side and then dividing both sides by 6 so we have y=-0.6x+2 so m the slope is -0.6

Answer:

How do you interpret the y-intercept in the context of the problem?

The y-intercept of a line is the value of y where the line crosses the y-axis. In other words, it is the value of y when the value of x is equal to 0. Sometimes this has true meaning for the model that the line provides, but other times it is meaningless.

Step-by-step explanation:

Answer:

The expected utility of perfect information is the maximum expected utility with perfect information minus the expected utility without perfect information.

With perfect information, the firm would know whether the new technology is successful or not, so the expected profit would be:

Probability of success * (Revenue - Cost with new technology) + Probability of failure * (Revenue - Cost without new technology)

= 3/8 * (12 - Q - 5 - 2Q) + 5/8 * (12 - Q - 5 - 6Q)

= 13/4 - Q/2

The maximum expected utility with perfect information is the square root of the expected profit, which is sqrt(13/4 - Q/2).

Without perfect information, the firm faces two possible outcomes: success with probability 3/8 and failure with probability 5/8. The expected profit is the probability-weighted average of the profits in each case:

Expected profit = Probability of success * Expected profit with success + Probability of failure * Expected profit with failure

The expected profit with success is (12 - Q - 5 - 2Q) = 7 - 3Q, and the expected profit with failure is (12 - Q - 5 - 6Q) = 7 - 7Q. Therefore:

Expected profit = 3/8 * (7 - 3Q) + 5/8 * (7 - 7Q)

= 27/8 - 5Q/8

The expected utility without perfect information is the square root of the expected profit, which is sqrt(27/8 - 5Q/8).

Thus, the expected utility of perfect information is:

sqrt(13/4 - Q/2) - sqrt(27/8 - 5Q/8) = 3.25

Therefore, the answer is option C, 3.25.

The maximum willingness to pay for perfect information is equal to the difference between the expected profit with perfect information and the expected profit without perfect information.

The expected profit with perfect information is:

Probability of success * (Revenue - Cost with new technology) + Probability of failure * (Revenue - Cost without new technology)

= 3/8 * (12 - Q - 5 - 2Q) + 5/8 * (12 - Q - 5 - 6Q)

= 13/4 - Q/2

The expected profit without perfect information is:

Expected profit = Probability of success * Expected profit with success + Probability of failure * Expected profit with failure

The expected profit with success is (12 - Q - 5 - 2Q) = 7 - 3Q, and the expected profit with failure is (12 - Q - 5 - 6Q) = 7 - 7Q. Therefore:

Expected profit = 3/8 * (7 - 3Q) + 5/8 * (7 - 7Q)

= 27/8 - 5Q/8

The maximum willingness to pay for perfect information is:

13/4 - Q/2 - (27/8 - 5Q/8) = 3.25 - 3Q/8

Therefore, the answer is option B, 3.25.

The Hermite curve with four control points P0(0,0), P1(1,1), P2(2,-1), and P3(3,0) has tangent vectors P0'(1,1) and P3'(1,1) at the endpoints. To determine the intermediate points on the curve at t = 1/3 and t = 2/3, we can use the Hermite interpolation formula.

The Hermite interpolation formula allows us to construct a curve based on given control points and tangent vectors. In this case, we have four control points P0, P1, P2, and P3, and tangent vectors P0' and P3'.

To find the intermediate point at t = 1/3, we use the Hermite interpolation formula:

P(t) = \((2t^3 - 3t^2 + 1)P0 + (-2t^3 + 3t^2)P3 + (t^3 - 2t^2 + t)P0' + (t^3 - t^2)P3'\)

Substituting the given values:

\(P(1/3) = (2(1/3)^3 - 3(1/3)^2 + 1)(0,0) + (-2(1/3)^3 + 3(1/3)^2)(3,0) + ((1/3)^3 - 2(1/3)^2 + (1/3))(1,1) + ((1/3)^3 - (1/3)^2)(1,1)\)

Simplifying the equation, we can find the coordinates of the intermediate point at t = 1/3.

Similarly, for t = 2/3, we use the same formula:

\(P(2/3) = (2(2/3)^3 - 3(2/3)^2 + 1)(0,0) + (-2(2/3)^3 + 3(2/3)^2)(3,0) + ((2/3)^3 - 2(2/3)^2 + (2/3))(1,1) + ((2/3)^3 - (2/3)^2)(1,1)\)

Calculating the equation yields the coordinates of the intermediate point at t = 2/3.

In this way, we can use the Hermite interpolation formula to determine the intermediate points on the Hermite curve at t = 1/3 and t = 2/3 based on the given control points and tangent vectors.

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Answer:

a. The company's profit function P(x, y, z) = 24x +12y +16z – 0.2x^2 – 0.1y^2 – 0.1z^2 – 26

b. The number of cars that must be sold in each market are 60 in America, also 60 in Europe and 80 in Asia.

Step-by-step explanation:

Note: This question is not complete and it has some errors in the figures used. The correct complete question is therefore provided before answering the question as follows:

An automobile manufacturer sells cars in America, Europe, and Asia, charging a different price in each of the three markets. The price function for cars sold in America is p = 27 − 0.2x  (for 0 ≤ x ≤ 135), the price function for cars sold in Europe is q = 15 − 0.1y  (for 0 ≤ y ≤ 150), and the price function for cars sold in Asia is r = 19 − 0.1z (for 0 ≤ z ≤ 190), all in thousands of dollars, where x, y, and z are the numbers of cars sold in America, Europe, and Asia, respectively. The company's cost function is C = 26 + 3(x + y + z) thousand dollars.

(a) Find the company's profit function P(x, y, z). [Hint: The profit will be revenue from America plus revenue from Europe plus revenue from Asia minus costs, where each revenue is price times quantity.]

P(x, y, z) =

(b) Find how many cars should be sold in each market to maximize profit. [Hint: Set the three partials Px, Py, and Pz equal to zero and solve. Assuming that the maximum exists, it must occur at this point.]

The explanation to the answers is now given as follows:

(a) Find the company's profit function P(x, y, z). [Hint: The profit will be revenue from America plus revenue from Europe plus revenue from Asia minus costs, where each revenue is price times quantity.]

p = price function for cars sold in America = p = 27 − 0.2x (for 0 ≤ x ≤ 135)

q = price function for cars sold in Europe = 15 − 0.1y (for 0 ≤ y ≤ 150)

r = price function for cars sold in Asia = 19 − 0.1z (for 0 ≤ z ≤ 190)

C = company's cost function = 26 + 3(x + y + z) = 26 + 3x + 3y + 3z

P(x, y, z) = profit function

x, y, and z are the numbers of cars sold in America, Europe, and Asia, respectively

Therefore, we have:

TR = Total revenue = px + qy + rz …………………………….. (1)

Substituting the relevant values into equation (1), we have:

TR = (27 − 0.2x)x + (15 − 0.1y)y + (19 − 0.1z)z

TR = 27x – 0.2x^2 + 15y – 0.1y^2 + 19z – 0.1z^2

Also,

P(x, y, z) = TR – C ……………………………………… (2)

Substituting the relevant values into equation (2), we have:

P(x, y, z) = 27x – 0.2x^2 + 15y – 0.1y^2 + 19z – 0.1z^2 – (26 + 3x + 3y + 3z)

P(x, y, z) = 27x – 0.2x^2 + 15y – 0.1y^2 + 19z – 0.1z^2 – 26 – 3x – 3y – 3z

P(x, y, z) = 27x – 3x +15y – 3y +19z – 3z – 0.2x^2 – 0.1y^2 – 0.1z^2 – 26

P(x, y, z) = 24x +12y +16z – 0.2x^2 – 0.1y^2 – 0.1z^2 – 26 ……………….. (3)

Therefore, the company's profit function P(x, y, z) = 24x +12y +16z – 0.2x^2 – 0.1y^2 – 0.1z^2 – 26.

(b) Find how many cars should be sold in each market to maximize profit. [Hint: Set the three partials Px, Py, and Pz equal to zero and solve. Assuming that the maximum exists, it must occur at this point.]

As indicated in the question, the number cars that should be sold in each market to maximize profit can be calculated by deriving the three partials Px, Py, and Pz from the profit function P(x, y, z), i.e. equation (3) in part a above, and set equal to zero and then solve as follows:

In America

From equation (3), we have:

Px = 24 – 0.4x = 0

Therefore, we have:

24 – 0.4x = 0

24 = 0.4x

x = 24 / 0.4

x = 60

In Europe

From equation (3), we have:

Py = 12 – 0.2y = 0

Therefore, we have:

12 – 0.2y = 0

12 = 0.2y

y = 12 / 0.2

y = 60

In Asia

From equation (3), we have:

Pz = 16 - 0.2z = 0

Therefore, we have:

16 - 0.2z = 0

16 = 0.2z

z = 16 / 0.2

z = 80

Based on the above calculations, the number of cars that must be sold in each market are 60 in America, also 60 in Europe and 80 in Asia.

Answer:

x = 12.2;  angles are 77.6 and 102.4 total to 180

Step-by-step explanation:

The equations they are giving you for the two angles he was correct about.  When a line intersects two parallel lines, the angles on the opposite sides of the transverse line will equal 180 degrees.

So those two equations when added together must equal 180 degrees.

(5x + 16.6) + (9x - 7.4) = 180

Rearrange the equation

5x + 9x + 16.6 - 7.4 = 180

Add the x values together and subtract the regular numbers

14x + 9.2 = 180

Subtract 9.2 from both sides

14x = 170.8

Divide both sides by 14

x=12.2

The top angle in your drawing is 5x + 16.6  or

5 ( 12.2) + 16.6 = 77.6 degrees

The bottom angle in your drawing is 9x - 7.4 or

9 ( 12.2) - 7.4  = 102.4

Both angles added together is 77.6 + 102.4 = 180

Answer:

×=25 ; angle = 107 degree

Step-by-step explanation:

if a transversal line intersect two parallel lines then the sum of two consecutive exterior angles is 180 degrees.

The two consecutive exterior angles are 3x+32 and x+48.

3x+32+x+48=1803x+32+x+48=180

4x+80=1804x+80=180

4x=180-804x=180−80

4x=1004x=100

x=25x=25

The value of x is 25.

The measure of two consecutive exterior angles are

3x+32=3(25)+32=1073x+32=3(25)+32=107

x+48=25+48=73x+48=25+48=73

The measure of the larger angle is 107 degrees.

If MSwithin is smaller than MSbetween, then increasing MSwithin and/or decreasing MSbetween will lead to an increase in the F statistic.

The F statistic is calculated by dividing the variance between groups (MSbetween) by the variance within groups (MSwithin). Therefore, to increase the value of the F statistic, either the numerator (MSbetween) needs to increase, or the denominator (MSwithin) needs to decrease.

So, the answer is:

a. MSwithin > MSbetween

If the variance within groups (MSwithin) is reduced or the variance between groups (MSbetween) is increased, the F statistic will increase. Therefore, if MSwithin is smaller than MSbetween, then increasing MSwithin and/or decreasing MSbetween will lead to an increase in the F statistic.

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Answer:

-21/11

Step-by-step explanation:

slope m= (y2-y1) / (x2-x1)

m= -15-6 /9+2 = -21 / 11

Answer:

5.541 gallons

Step-by-step explanation:

The fish tank is 1280 cubic inches, which equates to 5.541 US liquid gallons.

Answer:

5.54 gallons     (aprox.)

Step-by-step explanation:

volume = 16in * 10in * 8in

volume = 1280in³

Convert cubic inch to gallons is:

1 inch³ = 0.004329 gallon

then:

1280in³ = 1280*0.004329 = 5.54 gallons  (aprox.)

The solution to the initial value problem y'' - 5y' + 4y = 0, y(0) = 1, y'(0) = 0 is: y(t) = (1/3)e^(4t) - (1/3)e^t

To solve this initial value problem using Laplace transforms, we first take the Laplace transform of both sides of the differential equation:

L{y''} - 5L{y'} + 4L{y} = 0

Using the properties of Laplace transforms, we can simplify this to:

s^2 Y(s) - s y(0) - y'(0) - 5 (s Y(s) - y(0)) + 4 Y(s) = 0

Substituting the initial conditions, we get:

s^2 Y(s) - s - 5sY(s) + 5 + 4Y(s) = 0

Simplifying and solving for Y(s), we get:

Y(s) = 1 / (s^2 - 5s + 4)

We can factor the denominator as (s-4)(s-1), so we can rewrite Y(s) as:

Y(s) = 1 / ((s-4)(s-1))

Using partial fraction decomposition, we can write this as:

Y(s) = A/(s-4) + B/(s-1)

Multiplying both sides by the denominator, we get:

1 = A(s-1) + B(s-4)

Setting s=1, we get:

1 = A(1-1) + B(1-4)

1 = -3B

B = -1/3

Setting s=4, we get:

1 = A(4-1) + B(4-4)

1 = 3A

A = 1/3

Therefore, we have:

Y(s) = 1/(3(s-4)) - 1/(3(s-1))

Taking the inverse Laplace transform of each term using a Laplace transform table, we get:

y(t) = (1/3)e^(4t) - (1/3)e^t

Therefore, the solution to the initial value problem y'' - 5y' + 4y = 0, y(0) = 1, y'(0) = 0 is:

y(t) = (1/3)e^(4t) - (1/3)e^t

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When the residual is negative it represents the predicted value is very much high.

Therefore, the negative residual value on the regression line represents the predicted value is very much high.

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As angle OAB =40-degree, angle AOB is 100 degrees according to the properties of circle and triangle.

Some Properties of circle are distance from center of the circle to each point on the circumstances are equal. hence, OA=OB

Diameter is twice of radius.

The triangle having two equal side length is called isosceles triangle. In the figure, triangle OAB is an isosceles as OA=OB=radius

According to the criteria of isosceles triangle angle OAB =OBA =40°

hence, angle AOB= 180 degrees - (40°+40°) [angle sum of triangle =180°]

                  angle AOB= 100 degrees.

We get, AOB = 100 degrees

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Answer:

5 maybe

Step-by-step explanation:

Denia's score is required.

Denia's score will be \(+5\).

Steve's score is 5 points away from zero.

This means it may be \(+5\) or \(-5\)

Denia's score is opposite of Steve's.

This means Steve's score is opposite of Denia's.

Denia's score is positive.

The opposite of positive will be negative.

So, Steve's score will be \(-5\) and Denia's score will be \(+5\).

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Answer:

Small jet seat capacity: 73

Large jet seat capacity = 90

Step-by-step explanation:

Let x be the number of seats on the small jet

Let y be the number of seats on the large jet

From the word description for last week:

Last week, she worked on flights on 1 small jet and 2 large jets, which could seat a total of 253 passengers

we can formulate the equation
1x + 2y = 253  .............(1)

For the week before:
The week before, she was assigned to flights on 5 small jets and 4 large jets, which could seat a total of 725 passengers

5x + 4y = 725 ...............(2)

Equation (1)  x 2 ==>
2x + 4y = 2(253)

2x + 4y = 506  ..............(3)

So our two equations are:

5x + 4y = 725 . .............(2)
2x + 4y = 506  ..............(3)

Equation (2) - Equation (3) will eliminate the y terms making it possible to solve for x
(5x + 4y) - (2x + 4y) = 725 - 506

5x + 4y - 2x - 4y = 219

5x -2x +4y - 4y = 219

3x = 219

x = 219/3

x = 73

Plugging this value back into equation (1): 1x + 2y = 253 we get
1(73) + 2y = 253

73 + 2y = 253

2y = 253 - 73

2y = 180

y = 180/2

y = 90

Answer
Small jet seat capacity: 73

Large jet seat capacity = 90

Step-by-step explanation:

\( \frac{360 - 2(99)}{2} = \\ = \frac{360 - 198}{2} = \\ = \frac{162}{2} = \\ = 81\)

Answer: 81°

Step-by-step explanation:

Angles on a straight line always add up to 180°.

So as a and 99° are on the same straight line you would have to do 180-99=81°

Hope this helps :)

Answer:

y-5=-2/3(x-(-7))

Step-by-step explanation:

I just learned this recently as well so bare with me.

So the point slope form is y-y1=m(x-x1)

So first we have to find the slope. So we do 5-(-1)/-7-1=-6/8=-3/4

So now, we just have to plug in the numbers.

So y-5=-2/3(x-(-7)).

I know that looks a little funky but if you used the slope intercept form, you would get the same answer if you just simplified this version. Of course, you don't have to simplify this version because this version is completely acceptable.

I hope this helped.

The probability that the number of free throws he makes exceeds 80 is approximately 0.5000.

The complete question is as below:-

A college basketball player makes 80% of his free throws. Over the course of the season, he will attempt 100 free throws. Assuming free throw attempts are independent, the probability that the number of free throws he makes exceeds 80 is approximate:____________.

A) 0.2000

B) 0.2266

C) 0.5000

D) 0.7734

Probability is defined as the ratio of the number of favourable outcomes to the total number of outcomes in other words the probability is the number that shows the happening of the event.

Given that,

A college basketball player makes 80% of his free throws.

Over the course of the season, he will attempt 100 free throws.

Assuming free throw attempts are independent.

We have to determine,

The probability that the number of free throws he makes exceeds 80 is.

According to the question,

P(Make a Throw) = 80% = 0.80

number of free throws n = 100

Binomial distribution:

Mean: n x p = 0.80 x 100 = 80

Then, The standard deviation is determined by using the formula;

\(\sigma\) = \(\sqrt{np(1-P)\)

  = \(\sqrt{80\TIMES (1-0.80)\)

  = \(\sqrt16\)

  = 4

Therefore,

To calculate the probability that the number of free throws he makes exceeds 80 we would have to make the following calculation:

P ( x> 80) = 1 - P ( x < 80)

To calculate this value via a normal distribution approximation:

P ( \(Z < \dfrac{80-80}{4})\) = 1-P(Z < 0 ) = 1 - 0.50 = 0.500

Hence, The probability that the number of free throws he makes exceeds 80 is approximately 0.5000.

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Answer:

f = € 0.20

k = € 2.20

Step-by-step explanation:

k + f = 2.40

k = 2 + f

(2 + f) + f = 2.40

2f = 2.40 - 2

2f = 0.40

f = € 0.20

k = 2 + 0.20 = € 2.20

Answer: 19,38, and 33.

Step-by-step explanation:

80=2x+x+2x-5=5x=95=x=19