the length of a rectangle is increasing at a rate of 3 cm/s and its width is increasing at a rate of 5 cm/s. when the length is 15 cm and the width is 13 cm, how fast is the area of the rectangle increasing (in cm2/s)?

Answer:

The answer is b

Step-by-step explanation:

By using the concept of Population and sample, it can be concluded that

The above data would be a population of weights because they represent all of the football players.

The first option is correct

What is population and sample?

Population is the set where all item are the members of the sets and from where the set of items can be drawn for statistical study

Subset of population is called sample

Here the data would be a population of weight because they represent all of the football players .

This is not a subset. So the question of sample will not come into existance here

So the first option is the correct option

The above data would be a population of weights because they represent all of the football players.

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Complete Question

The statistical data has been given below

Following are the published weights (in pounds) of all of the team members of Football Team A from a previous year. 176; 202; 212; 212; 232; 205; 185; 185; 178; 210; 206; 212; 184; 174; 185; 242; 188; 212; 215; 247; 241; 223; 220; 260; 245; 259; 278; 270; 280; 295; 275; 285; 290; 272; 273; 280; 285; 286; 200; 215; 185; 230; 250; 241; 190; 260; 250; 302; 265; 290; 276; 228; 265

None of these ordered pairs work. Each is false for at least one of the 2 equations.

What is inequality?

An inequality in mathematics depicts the connection between two values in an algebraic statement that are not equal. One of the two variables on the two sides of the inequality may be greater than, greater than or equal to, less than, or less than or equal to another value, according to inequality signals.

(1, 0) is false for equation 1.

y > -3x + 3

0 > -3(1) + 3

0 > -3 + 3

0 > 0 (FALSE)

(-1, 1) is false for equation 1.

y > -3x + 3

1 > -3(-1) + 3

1 > 3 + 3

1 > 6 (FALSE)

(2, 2) is false for equation 2.

y > 2x - 2

2 > 2(2) - 2

2 > 4 - 2

2 > 2 (FALSE)

And (0, 3) is false for equation 1.

y > -3x + 3

3 > -3(0) + 3

3 > 3 (FALSE)

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Question:

Which ordered pair makes both inequalities true? y > –3x + 3 y > 2x – 2 (1,0) (–1,1) (2,2) (0,3)

The p-value for this hypothesis test for a proportion p is 0.039.

What is a random sample?

In statistics, a simple random sample is a subset of individuals chosen from a larger set in which a subset of individuals is chosen randomly, all with the same probability. It is a process of selecting a sample in a random way.

For the null hypothesis,

H0 : p = 0.63

For the alternative hypothesis,

Ha : p < 0.63

This is a left-tailed test

Considering the population proportion, probability of success, p = 0.63

q = probability of failure = 1 - p

q = 1 - 0.63 = 0.37

Considering the sample,

Sample proportion, P = x/n

Where,

x = number of success = 478

n = number of samples = 800

P = 478/800 = 0.6

We would determine the test statistic which is the z score

z = (P - p)/√pq/n

z = (0.6 - 0.63)/√(0.63 × 0.37)/800 = - 1.76

From the normal distribution table, the area below the test z score in the left tail is 0.039

Thus,

p = 0.039

Hence, the p-value for this hypothesis test for a proportion p is 0.039.

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The expected value of this game is $20.The typical net gain or loss that we would anticipate from playing a game of chance several times is known as the anticipated value.

Simply multiply each value of the discrete random variable by the probability associated with that value to obtain the expected value, E(X), or mean. E (X) = = x P (x) is the formula that is given.

The typical net gain or loss that we would anticipate from playing a game of chance several times is known as the anticipated value. By dividing the value of each outcome by the likelihood that it will occur, we can calculate the expected value. Then, we total up all the results.

The formula is given as E ( X ) = μ = ∑ x P ( x ) .

                                                         = $5 * $4

                                                          = $20.    

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The case mentioned above is resolved via multiplication.

Given information,

Linda can sell 12 magazine subscriptions per week and makes 4$ for each magazine subscription she sells. This means that Linda will make 48$ per week from magazine subscriptions.

To show it mathematically,

1 week ⇒ 12 magazines

Each of them costs $4;

⇒ 12 * 4$ = 48$ per week

By using multiplication we solve the above-given case.

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The height of the tree to the nearest centimeter is 613 centimeters

A proportion can be described as an equation having two ratios set equal to each other.

It is also seen as the mathematical comparison of two elements, numbers of ratios.

From the information given, we have that;

If 57 centimeters = 161 centimeters

Then 217 centimeters = x

cross multiply

x = 161(217)/57

multiply the values

x = 34, 937/57

x = 613 centimeters

Hence, the value is 613 centimeters

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Answer:

a. parameter

Step-by-step explanation:

A parameter is any descriptive measure of a population characteristic.

By using the formula for mean and variance, it can be calculated that

Mean of X = 25

Variance of X = 51.67

What is mean and variance?

Suppose there is a data set. Mean gives the average of the values of the data set

Variance is the square of the sum of deviation from mean.

Let x be the total; of the numbers on the two card

Possible values of X= 15, 20, 25, 30, 35

P(X = 15) = [tex]\frac{2}{12}[/tex]

P(X = 20) = [tex]\frac{2}{12}[/tex]

P(X = 25) = [tex]\frac{4}{12}[/tex]

P(X= 30) = [tex]\frac{2}{12}[/tex]

P(X = 35) = [tex]\frac{2}{12}[/tex]

Mean of X =

[tex]15 \times \frac{2}{12} + 20 \times \frac{2}{12} +25 \times \frac{4}{12} + 30 \times \frac{2}{12} + 35 \times \frac{2}{12}\\\\\frac{300}{12}\\\\25[/tex]

Variance of X =

= [tex](225 \times \frac{2}{12} + 400 \times \frac{2}{12}+625 \times \frac{4}{12}+900 \times \frac{2}{12}+1225 \times \frac{2}{12}) - (25)^2\\\\\frac{8000}{12} - 625}\\\\666.67 - 625\\\\51.67[/tex]

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Complete Question

In a box are four cards numbered 5, 10, 15, 20. two cards are taken out at random without replacement, and X is the total; of the numbers on the two card. Find the mean and variance of X .

Okay here is step by step.

2x + 8 = 15

2x = 15 - 8

2x = 7

7/2 = 3.5

3.5 = x

Because we use the laws of substitution switching the numbers to the other side, which is allowed because they still mean the same thing.

Hope this helps.

Applying the given exponential function  y = 7.1(1.03)ˣ, the amount produced in 2006 was approximately 7.8 billion pounds and the estimated amount in 2014 will be approximately 9.8 billion pounds

An exponential function is a function of form f (x) = ax, where “x” is a variable and “a” is a constant which is called the base of the function and it should be greater than 0.

In the function given;

y = 7.1(1.03)ˣ

a) What is the estimated number in 2006

The value of x in 2006 is

x = 3

Plug the values into the formula above;

y = 7.1(1.03)³

y = 7.76 ≅ 7.8 billion pounds

b)

The cheese produced in 2014

The value of x in 2014 = 11

Plug in the value

y = 7.1(1.03)¹¹

y = 9.83 ≅ 9.8 billion pounds

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Yes, you can still get from one city to another even if a road is closed for maintenance.

How is it feasible to get from one city to another if one road is closed for repairs?

It is sufficient to show that even with route AB closed, we can still get from point A to point B. In the connected component that contains vertex A, all the vertices would be even if this weren't the case.

When a connected component has exactly one odd vertex, the "A graph must have an even number of odd vertices" condition is violated.

Therefore, even if one of the roads is closed for maintenance, it is still possible to go from Point A to Point B by another road or city.

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The given question is improper. Proper question is given below;

in a certain country, 40 roads lead out of each city. when all roads are open, it is possible to travel from any city to any other. each road leads from one city to another; there are no dead end roads. if one road is closed for repairs, is it still necessarily possible to travel from any city to any other? prove your answer.

The table which shows probability distribution is ,

X    P(X)

0    0.25

1      0.05

2     0.7

What is probability distribution?

   In mathematics, a probability distribution is a function that expresses the likelihood of many possible values for a variable. Utilizing graphs or probability tables, probability distributions are frequently represented. For a specific data generation process, a probability distribution shows the anticipated results of potential values. According to the mean, standard deviation, skewness, and kurtosis, probability distributions can take many different forms and exhibit a variety of properties.

A= Older eaglet survive

B = Younger eaglet survive

Given the older eaglet has 50% of survival ,

P(A) = 50% = 50/100 = 0.5

Now the older eaglet survive , the younger eaglet have only 10% of survival chance,

=> P(B/A)=10% = 10/100 = 0.1

Here P(B/A) = P(B∩A)/P(A)

=> 0.1 = P(B∩A) ×0.5

=> P(B∩A) = 0.05.

Both eaglet survives is P(B∩A) = 0.05. -------> 1

Now if the older eaglet does not have survive , the younger eaglet has 30% of survival chance,

=>P(B/A') = 30% = 0.3

Here P(B/A') = P(B∩A')/P(A')

Here P(A') = 1-P(A) = 1-0.50 = 0.50.

=> P(B∩A') = P(B/A')*P(A')

=> P(B∩A') = 0.3*05

=> P(B∩A') = 0.15

Now P(B) = P(B∩A)+P(B∩A')

=> P(B) = 0.05+0.15

=> P(B) = 0.20

P(only one eaglet survive) = P(A)+P(B)

=> 0.5+0.2 = 0.7 .-------> 2

Let x be the number of eaglet that survive,

Here x takes value of 0,1,2.

P(both eaglet survive ) = 0.05 ( from equation 1)=P(X=2)

P(only one eaglet survive) = 0.7 (from equation 2) =P(x=1)

As we know x takes only 3 values and we want to find probability distribution of x,

=> P(X=0) = 1-P(X=1)-P(x=2)

=> P(X=0) = 1-0.7-0.05

=> P(X=0) = 0.25 .

Therefore the table which shows probability distribution ,

X    P(X)

0    0.25

1      0.05

2     0.7

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Answer:

an obtuse angle are angles that are greater than 90 degrees

Step-by-step explanation:

an obtuse angle are angles that are greater than 90 degrees

The required value of g would be 7.

The slope of a line is defined as the gradient of the line.

We have been given that a line that includes the points (0, – 3) and (g, 3) has a gradient of 6/ 7.

The gradient of line = (3 - (-3))/(g - 0)

⇒ 6/7 = (3 + 3)/g

⇒ 6/7 = 6/g

Apply the cross-multiplication operation,

⇒ 6g = 42

⇒ g = 42/6

Apply the division operation,

⇒ g = 7

Therefore, the required value of g would be 7.

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The Gross profit is $178, in the ending inventory using the periodic inventory.

What is profit?

To determine how much profit has been generated in a transaction, apply the profit formula. A product is said to have made a profit when its selling price is higher than its cost. The profit formula is useful for figuring out how much money is made when a certain product is sold, often in a business, or for figuring out how much money is made in any financial transaction. In situations where the selling price exceeds the cost price, profit can be determined. The following is the formula to calculate the profit:

Selling price minus cost price is referred to as profit (C.P.)

the last-in, first-out principle. According to LIFO, expenses are deducted starting with the costs of the most recent purchases of goods.

The most recent purchases, which were made on January 18 and January 12, resulted in 16 units.

Cost of goods sold = (7*6) + (9*4) = 42 + 36 = $78

Sales = 16*16 = $256

Gross profit = Sales - Cost of goods sold = 256 - 78 = $178

Hence, the Gross profit is $178

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The bearing of the oil rig from the port is 28.61° west by north.

What are the trigonometric identities?

All trigonometric identities are based on the six trigonometric ratios. Sine, cosine, tangent, cosecant, secant, and cotangent are the functions. All of these trigonometric ratios are defined using the sides of a right triangle, specifically the adjacent, opposite, and hypotenuse sides.

We have,

First, the boat travels 55km toward the west,

and then it travels 30km toward the north.

So the boat forms the right triangles, see in the image attached,

tanθ = 33/55

θ = tan⁻¹ (33/55)

θ = 28.61°

28.61° west by north.

Hence, the bearing of the oil rig from the port is 28.61° west by north.

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The highest temperature can be increased by any amount without changing the median.

Here, we are given the following data set-

94, 93, 98, 101, 98, 96, and 93

To find the median of the given numbers, we first need to arrange the numbers in an ascending or descending order. Let us arrange them in an ascending order as follows-

93, 93, 94, 96, 98, 98, 101

Now, the median of the middlemost value of a data set.

Here, we have 7 values, thus, the middlemost value will be given by the 4th term in the series.

As we can see from above, the fourth value is 96. Hence, 96 is the median of the data set.

Now, as we can see the highest temperature value is 101. We can increase it by any amount and it will still be the last term in the series, and the median will remain the same middle value, that is, 96.

Thus, the highest temperature can be increased by any amount without changing the median.

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If the mean of a statistic's sample distribution perfectly matches the actual value of the parameter being evaluated, the statistic is said to be unbiased. The population proportion p is best estimated objectively using the sample proportion (p hat) from an SRS.

If the expected value of an estimate for a given parameter is the same as the parameter's true value, the estimator is said to be impartial. To put it another way, an estimator is impartial if it generates parameter estimates that are generally accurate.

The mean of a sample taken from a population is calculated to produce a point estimate of the population mean. The mean is calculated by dividing the total sample values by the total number of values.

Hence we get the required answer.

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The first two events are not independent, with a probability P = 0.0637

The second pair of events are independent, and the probability is P = 0.0625

How is probability obtained?

First, the probability that any card will be picked at random will be the same for all cards in the deck, or p = 1/52.

A) If Lacy draws a diamond card first, there are now fewer cards in the deck (now there are 51 cards on the deck). As a result, there is now a higher chance than before of drawing a spade. In that case, the first two events are not random.

The Probability of getting the first diamond card is:

P = 13/52 (because there are 13 diamonds and a total of 52 cards).

The probability of drawing a spade after is:

Q = (13/51)

The joint probability is the product of the individual probabilities, this will give:p = P×Q = (13/52)×(13/51) = 0.0637

B) Now we replace the first card, then the events are now independent, as the probability of drawing a spade after the first draw is not changed (because the total number of cards will be 52).

The probability of drawing a diamond is:

P = 13/52

Now we replace the diamond card drawn.

The probability of drawing a spade will be:

Q = 13/52

The joint probability is:

p = P×Q = (13/52)² = 0.0625

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The slope of the line that passes through the points (-3, 3), and (1, -5) is -2.

Steps to finding slope:

The formula for finding slope from two points (x₁, y₁) and (x₂, y₂) on a line is m = (y₂ - y₁) / (x₂ - x₁). Here,

m = slope of the line

x₁ = the x-coordinate of the first point

y₁ = the y-coordinate of the first point

x₂ = the x-coordinate of the second point

y₂ = the x-coordinate of the second point

Here, the given points are  (-3, 3), and (1, -5):

y₂ = -5, y₁ =3 , x₂ = 1, x₁ = -3

Substitute the values,

m = (y₂ - y₁) / (x₂ - x₁)

m = (-5 - 3) / (1 - (-3))

= -8 / (1+3)

= -8 / 4

m = -2

Hence, the slope of the line that passes through the points (-3, 3), and (1, -5) is -2.

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The Cartesian equation will be;

⇒ x² + y² - 4x - 5y = 0

What is an expression?

Mathematical expression is defined as the collection of the numbers variables and functions by using operations like addition, subtraction, multiplication, and division.

Given that;

The polar equation will be;

⇒ r = 4 sin(θ) + 5 cos(θ)

Now,

Substitute r = √x² + y² , r sin θ = x, r cos θ = y in above equation, we get;

The polar equation will be;

⇒ r = 4 sin(θ) + 5 cos(θ)

⇒ r² = 4 r sin(θ) + 5 r cos(θ)

⇒ x² + y² = 4x + 5y

⇒ x² + y² - 4x - 5y = 0

Thus, The Cartesian equation will be;

⇒ x² + y² - 4x - 5y = 0

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The ordered pair (4, 0) makes both inequalities true.

What is inequality equation?

The mathematical expressions in which both sides are not equal are called inequalities.

Main body:

In inequality, unlike in equations, we compare two values.

The equal to sign in between is replaced by less than, greater than or not equal to sign.

It is given that

y < 3x -1 …. (1)

y > -x + 4 …. (2)

Let us take the point (4, 0)

In inequality (1)

y < 3x-1

0 < 3 (4) - 1

0 < 12 - 1

0 < 11 which is true

In inequality (2)

y ≥ - x + 4

0 ≥ -4 + 4

0 ≥ 0 …. Which is true

Therefore, the ordered pair (4, 0) makes both inequalities true.

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When testing a newly installed hydromatic propeller, the propeller is exercised by moving the governor control through its entire travel several times to free the dome of any entrapped air.

A hydromatic propeller uses a double-acting governor control utilizing oil pressure on both sides of the propeller piston. It was introduced in the 1930s as a substantial advancement over the counterweight, controllable pitch propeller. The application of oil pressure to both sides of the actuating piston provided improved capacity and the potential of feathering or unfeathering by a single control knob. It was designed for larger blades, faster rate of pitch change, and wider range of pitch control. A hydromatic propeller should be checked before, during, and after the operation of the engine. A newly installed hydromatic propeller should be checked by moving the governor along its travel numerous times to ensure that no air is entrapped in the dome.

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The minimum height is 6ft and length is 12 ft.

Let  [tex]l[/tex] be side of square base and h be the height.

we know  [tex]l^{2}[/tex] × h  = 864

We have minimize

[tex]l^{2}[/tex] + 4 × [tex]lh[/tex]

=  [tex]l^{2}[/tex] + 4 × 864/l

diffrentitate and equate to 0

2[tex]l[/tex] - 4 × 964/ [tex]l^{2}[/tex]  = 0

[tex]l[/tex] = [tex]\sqrt[3]{2 * 864}[/tex] = 12

so h = 6

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Answer:

A

Step-by-step explanation:

the equation of a circle in standard form is

(x - h )² + (y - k )² = r²

where (h, k ) are the coordinates of the centre and r is the radius

here (h, k ) = (- 3, 6 ) and r = 2 , then

(x - (- 3) )² + (y - 6)² = 2² , that is

(x + 3)² + (y - 6)² = 4

By using the concept of cryptography, it can be concluded that

A solution that is now widely used to allow two parties to secretly exchange keys is Deffie - Hellman protocol

What is cryptography?

Cryptography refers to secure information and communication techniques derived from mathematical concepts and a set of rule-based calculations called algorithms, to transform messages in ways that are hard to decipher.

This is a concept of Cryptography

Diffie–Hellman key exchange establishes a shared secret between two parties which will be used for secret communication for exchanging data over a public network.

A solution that is now widely used to allow two parties to secretly exchange keys is Diffie - Hellman protocol

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Answer:

Step-by-step explanation:

The equation of the line in slope intercept form is y = 4/3x - 10/3.

What is a line in slope-intercept?

The equation of a line with a slope of m and a y-intercept of (0, b) is y = mx + b. To graph a slope-intercept line, do the following: On the coordinate plane, draw the y-intercept. Find another point on the line using the slope.

We have,

the line that passes through  (-3,-6) and slope m = -2/3.

Now using the slope and the point (-3, -6) the y-intercept is

m = -2/3.

y = mx + b

-6 = -2/3(-3) + b

6 = 6/3 + b

By further calculation,

b = 6 - 2

b = 4

By writing the equation in slope intercept form

y = mx + b

y = -2/3x - 4

Therefore, the equation of the line in slope intercept form is y = -2/3x - 4.

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