These times, in seconds, were recorded in eight 20-yard dash attempts: 3. 5, 2. 9, 2. 9, 3. 4, 3. 0, 2. 8, 3. 1, and 2. 8. Which representation is best for comparing exact times?

The point estimate of the population mean is 9

The point estimate of the population standard deviation is 2.83

Part a

Point estimate of population mean:

Given the sample data is 5,8,10,7,10,14

Number of samples, n is 6

Population mean=\(\frac{\sum x }{n}\)

                           =(5+8+10+7+10+14)/6

                           =54/6

                           =9

Point estimate of mean=9

Part b

Point estimate of population standard deviation:

Mean=9

Data (x)     (x-mean)^2

5                16

8                1

10               1

7                 4

10               1

14               25

Total           48

Standard deviation=√(x-mean)^2/n

                               =√48/6

                               =√8

                               =2.83

Hence, the point estimate of population standard deviation is 2.83

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We have the vertical asymptote at x = -2, the horizontal asymptote at

y = -3, and four plotted points: (-4, -4.5), (-1, 0), (0, -1.5), and (1, -2).

We have,

To graph the rational function (3x + 3) / (-x - 2), let's start by identifying the vertical and horizontal asymptotes.

Vertical asymptote:

The vertical asymptote occurs when the denominator of the rational function is equal to zero.

In this case, -x - 2 = 0.

Solving for x, we find x = -2.

Therefore, the vertical asymptote is x = -2.

Horizontal asymptote:

To find the horizontal asymptote, we compare the degrees of the numerator and denominator.

The degree of the numerator is 1 (highest power of x), and the degree of the denominator is also 1.

When the degrees are equal, the horizontal asymptote is determined by the ratio of the leading coefficients.

In this case, the leading coefficient of the numerator is 3, and the leading coefficient of the denominator is -1.

Therefore, the horizontal asymptote is y = 3 / -1 = -3.

Now,

Let's plot some points on the graph to help visualize it.

We will choose x-values on both sides of the vertical asymptote and evaluate the function to get the corresponding y-values.

Choose x = -4:

Plugging x = -4 into the function: f(-4) = (3(-4) + 3) / (-(-4) - 2) = (-9) / 2 = -4.5

So we have the point (-4, -4.5).

Choose x = -1:

Plugging x = -1 into the function: f(-1) = (3(-1) + 3) / (-(-1) - 2) = 0 / -1 = 0

So we have the point (-1, 0).

Choose x = 0:

Plugging x = 0 into the function: f(0) = (3(0) + 3) / (-0 - 2) = 3 / -2 = -1.5

So we have the point (0, -1.5).

Choose x = 1:

Plugging x = 1 into the function: f(1) = (3(1) + 3) / (-1 - 2) = 6 / -3 = -2

So we have the point (1, -2).

Thus,

We have the vertical asymptote at x = -2, the horizontal asymptote at y = -3, and four plotted points: (-4, -4.5), (-1, 0), (0, -1.5), and (1, -2).

You can plot these points on a graph and connect them to get an approximation of the graph of the rational function.

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¬ Vx(Fx → Gx) v 3xFx ⊢ Fx → Gx [1-5, Modus Ponens]

i. ∃x(Fx & Gx) ⊢ ∃xFx & ∃xGx (5 marks)

Proof:

1. ∃x(Fx & Gx) [Premise]

2. Fx & Gx [∃-Elimination, 1]

3. ∃xFx [∃-Introduction, 2]

4. ∃xGx [∃-Introduction, 2]

5. ∃xFx & ∃xGx [Conjunction Introduction, 3 and 4]

6. ∃x(Fx & Gx) ⊢ ∃xFx & ∃xGx [1-5, Modus Ponens]

ii. ¬ 3x(Px v Qx) ⊢ Vx ¬ Px (5 marks)

Proof:

1. ¬ 3x(Px v Qx) [Premise]

2. ¬ Px v ¬ Qx [DeMorgan’s Law, 1]

3. Vx ¬ Px [∀-Introduction, 2]

4. ¬ 3x(Px v Qx) ⊢ Vx ¬ Px [1-3, Modus Ponens]

iii. ¬ Vx(Fx → Gx) v 3xFx (10 marks; Hint: To derive this theorem use RA.)

Proof:

1. ¬ Vx(Fx → Gx) v 3xFx [Premise]

2. (¬ Vx(Fx → Gx) v 3xFx) → (¬ Vx(Fx → Gx) v Fx) [Implication Introduction]

3. ¬ Vx(Fx → Gx) v Fx [Resolution, 1, 2]

4. (¬ Vx(Fx → Gx) v Fx) → (Fx → Gx) [Implication Introduction]

5. Fx → Gx [Resolution, 3, 4]

6. ¬ Vx(Fx → Gx) v 3xFx ⊢ Fx → Gx [1-5, Modus Ponens]

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Given the side length of the square = 3 mi

The perimeter of the square = 4 times the length of one side

So, the perimeter = 4 x 3 = 12 mi

So, the answer will be perimeter = 12 mi

B = 5A.
C = 4A - 5.
180 = A + B + C.

Solve by representing B and C in terms of A.
180 = A + 5A + 4A - 5
185 = 10A
A = 18.5 degrees.

Use A to find B and C
B = 5(18.5) = 92.5
C = 4(18.5) - 5 = 69

18.5 + 92.5 + 69 = 180

A = 18.5
B = 92.5
C = 69

Answer:

119 r 9

Step-by-step explanation:

The two unit vectors are (2/5 +√5/10, 3/10 + 2√5/15) and (2/5 -√5/10, 3/10 - 2√5/15).

Given that, Angle = 60°, v = 8, 6

Consider unit vector a = (x, y)

x² + y² = 1 …. (1)

Now apply the dot product of unit vector with v

a.v = |a||v|cos Ø

a.v = √ (x² + y²) √ (8² + 6²) cos 60º

8x + 6y = 1 × 10 × ½

So we get,

8x + 6y = 5 …. (2)

y = (5 - 8x) / 6

Substituting the value of y in equation (1)

x² + y² = 1

x² + [(5 - 8x)/6]² = 1

x² + 25/36 + 16x²/9 - 20x/9 = 1

25x²/9 - 20x/9 = 11/36

So we get,

4 × (25x² - 20x) = 11

100x² - 80x = 11

100x² - 80x - 11 = 0

Now solve the quadratic equation,

x = { 2/5 ± √5/10}

Substituting the value of x in equation (2)

y = 3/10 ± 2√5/15

Therefore, the two unit vectors are (2/5 +√5/10, 3/10 + 2√5/15) and (2/5 -√5/10, 3/10 - 2√5/15).

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Answer:

Below in bold.

Step-by-step explanation:

The defender is at (x) = 35 yards

So height  y = (-1/40)35^2 + 35 + 6 = 10.375 ft

So as he only jumps to 9 feet he will not prevent the catch

Answer:

n = 3200

Step-by-step explanation:

200 = 1000 - \(\frac{n}{4}\) ( subtract 1000 from both sides )

- 800 = - \(\frac{n}{4}\) ( multiply both sides by 4 to clear the fraction )

- 3200 = - n ( multiply both sides by - 1 )

n = 3200

The coordinates of the point on the unit circle corresponding to a central angle of 21 degrees are (0.93, 0.36), which is answer choice c.

The point on the unit circle corresponding to a central angle of 21 degrees can be found using the trigonometric functions sine and cosine.

In this case, the x-coordinate is equal to the cosine of the angle and the y-coordinate is equal to the sine of the angle.

Converting degrees to radians, we have:

x = cos(21) = 0.93

y = sin(21) = 0.36

A unit circle in mathematics is a circle with a radius of one, or one unit. The unit circle is frequently the circle with radius 1 that is located at the origin (0, 0) in the Cartesian coordinate system on the Euclidean plane, notably in trigonometry.

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Answer:

x=-9

Step-by-step explanation:

Answer:

12 in.

Step-by-step explanation:

You have to use the Pythagorean theorem for this problem. Since we are solving for DE, we do:

5 squared + b squared = 13 squared

25 + b squared = 169

Isolate the b:

25 - 25 + b squared = 169 - 25

b squared = 144

Find the square root of 144 = 12

(The formula for the Pyathagorean theorem is a squared + b squared = c squared)

Answer:

categorical data

Answer:

Categorical Data

: )

Step-by-step explanation:

Answer:

The answer is 30m²

Step-by-step explanation:

Area of shaded part=Area of square -Area of shaded rectangle

A=6²-1×6

A=36-6

A=30m²

Answer:

(8, -7)

General Formulas and Concepts:

Pre-Algebra

Order of Operations: BPEMDAS

Distributive Property

Equality Properties

Algebra I

Step-by-step explanation:

Step 1: Define Systems

6x + 7y = -1

x - y = 15

Step 2: Rewrite Systems

x - y = 15

Step 3: Solve for y

Substitution

Step 4: Solve for x

Answer:

I think it's a.)

Step-by-step explanation:

It says that they already started off with $400 and raise $80 a day, and d stands for the number of days.

It's basically $80 a day being added on to the $400 that was already collected.

So it's 80d+400=7,600

The possible number of pizza special is (7 x 11 x 6 x 3 x 2 = 2772 variations.

The correct answer is c) an outlier and a leverage point.A data point far from the mean of both the x's and y's is both an outlier and a leverage point.

A data point that is far from the mean of both the x-values and y-values can be considered an outlier and a leverage point. An outlier is a data point that significantly deviates from the overall pattern of the data. It lies far away from the majority of the data points and can have a significant impact on statistical analysis.

On the other hand, a leverage point is a data point that has an extreme value in terms of its x-value. It has the potential to influence the regression line and can greatly affect the regression model's fit. Therefore, a data point far from the mean of both x's and y's can be considered both an outlier and a leverage point.

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Answer:

y=104

Step-by-step explanation:

1/4(y+24)= 32

y+24=128

y=128-24

y=104

One way to increase the probability of identifying the optimal decision when using a simulation is to increase the number of iterations or trials in the simulation.

Simulation is a powerful tool for modeling and analyzing complex systems or processes where there are many variables and uncertainties involved. However, the accuracy and reliability of the simulation results depend on the number of iterations or trials used in the simulation. The more trials or iterations are performed, the more accurate the simulation results are likely to be, and the higher the probability of identifying the optimal decision.

Therefore, to increase the probability of identifying the optimal decision in a simulation, one should increase the number of trials or iterations in the simulation. This means running the simulation multiple times with different input values or scenarios and recording the results for each run. By analyzing the results of multiple simulation runs, one can identify patterns, trends, and optimal decisions that are robust and reliable across different scenarios and conditions.

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Explanation

To solve the question, we will be aware that

There are 3 hours between 6PM and 9PM ,

The main pump's emptying rate is 1/4 tanker per hour. It will be open

the entire 3 hours, so it will empty 3/4 of the tank.

this means that the auxiliary pump must empty the remaining 1/4

Thus

Thus, we will have

Therefore

The auxiliary pump should start by 6pm + 45 minutes = 6:45pm

Answer:

what im confused any body else ?

Step-by-step explanation:

The relationship between the capacity and fluid ounce is; that capacity is the measurement while the fluid ounce is the measuring unit.

Since Capacity of a substance or object is the greatest quantity it can hold, whereas its volume is the amount of space it takes up.

We also know that fluid ounce is a volume measurement unit that is commonly used to measure liquids.

The Capacity is the amount of something that could be held by an object, while the Fluids ounces are one type of measurement of capacity. A few of examples of fluid ounces are:

2 pints= 1 quart

4 quarts= 1 gallon

8 fluid ounces = 1 cup

2 cups=1 pint

We can conclude that the relationship between the capacity and fluid ounce is that capacity is the measurement while the fluid ounce is the measuring unit.

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We can see Carlos’s real, after-tax ROI is A) 21.2%.

This is because he will have to pay taxes on his net profit, which will reduce his overall return on investment.

Tax is a financial charge or levy imposed by a government on individuals, businesses, or other entities to fund public expenditure and support various governmental functions.

It is a mandatory payment required by law and collected by government authorities at different levels, such as national, state, or local governments.

ROI = (Net Profit / Investment) x 100

In this case, Carlos's net profit is $10,000 and his investment is $50,000.

However, he will have to pay taxes on his net profit, which will reduce his overall return on investment.

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B’B is 3.5

Step-by-step explanation:

Segment A'B' is parallel to segment AB.

So, The length of segment AB is 7.5 units

The length of segment B'B is 3.5 units

Given :

Segment A'B' is parallel to segment AB. Few sides of the triangle is given.

Apply basic proportionality theorem

When  A'B' is parallel to segment AB then sides are proportional

\(\frac{CB'}{B'B} =\frac{CA'}{A'A}\)

Substitute the values

\(\frac{7}{B'B} =\frac{6}{3} \\cross \; multiply\\7(3)=B'B(6)\\21=B'B(6)\\Divide \; by \; 6\\B'B= \frac{21}{6} \\B'B=3.5\)

Now we find AB by making a proportion

\(\frac{CA'}{CA} =\frac{BA'}{BA} \\\frac{6}{9} =\frac{5}{AB} \\Cross \; multiply\\6(AB)=5 \cdot 9\\6AB=45\\Divide \; by \; 6\\AB=7.5\)

The length of segment AB is 7.5 units

The length of segment B'B is 3.5 units

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In essence, a function is a rule that assigns to each value of the input set (also known as the domain), a unique value of the output set (also known as the range).

A function is a fundamental mathematical concept that is used to describe the relationship between two sets of values.

To understand the idea of a function, imagine a machine that takes in an input and produces an output. The input values are the domain of the function, and the output values are the range. A function can be represented as an equation, a graph, or a table. For example, the equation f(x) = x + 3 represents a function that takes in an input value x and produces an output value that is 3 greater than the input value.

One of the key features of a function is that each input value must have a unique output value. This means that if you input the same value into the function twice, you should get the same output value both times. In mathematical terms, we say that a function is well-defined if it has a unique output value for each input value.

Functions are used in a wide range of mathematical applications, from algebra and calculus to statistics and data analysis. They provide a powerful tool for describing and analyzing relationships between different sets of values.

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Answer:

P(heads and even number) = 1/4

Step-by-step explanation:

Given:

Coin tossed for head

Dies role for Even number

Find:

P(heads and even number)

Computation:

P(heads) = 1/2

P(even number) = 3/6

P(even number) = 1/2

P(heads and even number) = P(heads) × P(even number)

P(heads and even number) = 1/2 × 1/2

P(heads and even number) = 1/4

The combined present worth of the costs associated with the proposed bridge design is $9,583,333.

This value is obtained by calculating the present worth of both the construction cost and the annual operating cost over an infinite life of the bridge, considering a MARR (Minimum Attractive Rate of Return) of 12%.

To determine the present worth, we use the formula:

PW = A / (1 + i)^n

Where PW is the present worth, A is the annual cost, i is the interest rate, and n is the number of years.

For the construction cost, we have a one-time expense of $9,000,000. Since it is a single payment, the present worth is equal to the construction cost itself.

For the annual operating cost, we need to calculate the present worth over an infinite life. Using the formula above, we divide the annual cost of $700,000 by the MARR of 12% to obtain $5,833,333.33. Thus, the combined present worth is the sum of the construction cost and the present worth of the annual operating cost, resulting in $9,000,000 + $5,833,333.33 = $9,583,333.

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