A ball is thrown into the air. It reaches height h in feet based on the model h=65t-16t2 where t is time in seconds. Use the discriminant. Will the ball reach 50ft? 70 feet? Explain.

Answer:

answer 2

Step-by-step explanation:

3*4=12

Answer:

B.  5^6 x 3^12

Step-by-step explanation:

(5^2 x 3^4)^3 =

5 x 5 x 3 x 3 x 3 x 3 =

25 x 81 =

2025

2025^3 =

8,303,765,625

Option B is correct because,

5^6 x 3^12 =

5 x 5 x 5 x 5 x 5 x 5 x 3 x 3 x 3 x 3 x 3 x 3 x 3 x 3 x 3 x 3 x 3 x 3 =

15,625 x 531,441 =

8,303,765,625

Answer:

Step-by-step explanation:

The slope of the given line in the graph is "undefined".

Slope, usually referred to as rise over run, is the "steepness" of the line.

By dividing the difference in y values between two points by the difference in x values, we may determine slope.

Thus, as the line is passing through the y axis and parallel to the x axis, the slope of the given line is undefined.

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Answer:

There is a multiplication error. The payment should be $48 per month.

Step-by-step explanation:

Answer:

There is a multiplication error. The payment should be $48 per month.

Step-by-step explanation:

Answer:

The only statement that is NOT true is option A.

- If 160 students buy a cookie, approximately 18 students would buy a sugar cookie.

Step-by-step explanation:

Complete Question

Ellen is opening. Cookie shop eat a local middle school . She randomly surgery’s students to determine The types of cookies they would buy at the cookie shop the results of the surveys are below based on the survey. Which statement is not true?

Cookie Survey

Type of Cookie | Number of Students

Chocolate Chip | 25

Oatmeal Raisins | 15

Peanut Butter | 22

Sugar | 18

A) If 160 students buy a cookie, approximately 18 students would buy a sugar cookie.

B) 22½% of the students surveyed would buy a sugar cookie.

C) If 240 students were to purchase a cookie from the store, approximately 66 students will purchase a peanut butter cookie.

D) Half of the students prefer chocolate chips or oatmeal raisin cookies.

Solution

First of, we obtain the proportion or percentages of students surveyed that buy each type of cookie.

Each of that is the number of students that buy the type of cookie in the sample divided by the Total number of students sampled.

Total number of students sampled = 25 + 15 + 22 + 18 = 80

Type of Cookie | N | proportion | %

Chocolate Chip | 25 | 0.3125 | 31.25%

Oatmeal Raisins | 15 | 0.1875 | 18.75%

Peanut Butter | 22 | 0.2750 | 27.50%

Sugar | 18 | 0.2250 | 22.50%

Now, taking the statements one by one

A) If 160 students buy a cookie, approximately 18 students would buy a sugar cookie.

Proportion of students that buy sugar cookie in the sample = 0.225

Number of students that will buy sugar cookie amongst 160 students = np = 160 × 0.225 = 36 students.

This statement is false, that is, NOT true.

B) 22½% of the students surveyed would buy a sugar cookie.

From the table, 22.5% of the students surveyed bought a sugar cookie. Hence, no matter the number of students, the percentage of students that will buy a sugar cookie will approximately be 22.5%.

This statement is True.

C) If 240 students were to purchase a cookie from the store, approximately 66 students will purchase a peanut butter cookie.

Proportion of students that buy peanut butter cookie in the sample = 0.275

Number of students that will buy peanut butter cookie amongst 240 students = np = 240 × 0.275 = 66 students.

This statement is true.

D) Half of the students prefer chocolate chips or oatmeal raisin cookies.

Proportion of students that buy chocolate chips or oatmeal raisin cookies in the sample = 0.3125 + 0.1875 = 0.50

0.50 is half of the distribution.

Hence, this statement too, is True.

Hope this Helps!!!

The value of k is -11.

Given

The equation 3√(x-k)-2=10 has a solution of x = 5.

To find the value of k put x = 5 in the equation then solve for the value of k.

Therefore,

The value of k is;

\(\rm 3\sqrt{x-k}-2=10\)

Substitute x = 5 in the equation

\(\rm 3\sqrt{5-k}-2=10\\\\\rm 3\sqrt{5-k}=10+2\\\\\rm 3\sqrt{5-k}=12\\\\\rm \sqrt{5-k}=\dfrac{12}{3}\\\\ \sqrt{5-k}=4\\\\\)

Squaring on both sides

\(\rm \sqrt{5-k}=\dfrac{12}{3}\\\\5-k=16\\\\-k = 16-5\\\\-k=11\\\\k=-11\)

Hence, the value of k is -11.

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The length of the QR is 16 cm when PQR ~MNO

In the given question, it is given that two similar triangles as PQR ~MNO

Then, the corresponding sides will be in equal proportion to each other as follows

PQ / MN = PR / MO = QR / NO

We need to find the length of the side QR

As above relations are given,

\(\frac{PQ}{MN}\) = \(\frac{PR}{MO}\) = \(\frac{QR}{NO}\)

\(\frac{30}{10}\) = \(\frac{5x + 7}{x+5}\) = \(\frac{4x}{\frac{16}{3} }\)

Equating all the fractions, equal to each we'll find

\(\frac{5x + 7}{x+5}\) = \(\frac{30}{10}\)

5x + 7 = 3(x +5)

5x + 7 = 3x + 15

2x = 8

x = 4

We know that, the length of the QR = 4x cm = 4 x 4 cm = 16 cm

Therefore, the length of the QR is 16 cm when PQR ~MNO

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The matrix must have pivot columns. Otherwise, the equation Ax = 0 would have a free variable, in which case the columns of A would not span R5. Therefore, the correct answer is C.

A pivot column is a column of the matrix that has a non-zero entry in the pivot position and all entries below the pivot are zero. In row echelon form, every row below a pivot column has a zero in the corresponding position. The pivot columns correspond to the linearly independent columns of the original matrix and the number of pivot columns determines the rank of the matrix.

The rank of a matrix is defined as the number of linearly independent columns or rows in the matrix. If the columns of a matrix span Rn, then the rank of the matrix must be equal to n. This means that the matrix must have n linearly independent columns. To ensure that the columns of A span R5, A must have at least 5 pivot columns. If A had fewer pivot columns, then the equation Ax = 0 would have a non-trivial solution, meaning that the columns of A would not be linearly independent and would not span R5.

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Therefore, √128 lies between 11 and 12 on a number line.

To determine the two numbers between which √128 lies on a number line, we can calculate the square roots of consecutive perfect squares that surround 128.

By calculating the square roots, we can find the two nearest whole numbers that √128 lies between.

Calculating the square roots of perfect squares near 128:

√121 = 11

√144 = 12

Since 128 is greater than 121 and less than 144, √128 lies between √121 and √144 on the number line.

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Answer:

the missing numbers be 60 and 6 respectively

Step-by-step explanation:

The computation of the missing numbers are shown below:

Let us assume the missing numbers be x

a/

, \(\frac{1}{2} \times 30 = \frac{1}{4} \times x\\\\15 = \frac{1}{4} \times x\\\\x = 60\)

b.

\(\frac{1}{3} \times 12 = \frac{2}{3} \times x\\\\4 = \frac{2}{3} \times x\\\\x = 6\)

Hence, the missing numbers be 60 and 6 respectively

A. From the statistical results, Jack can conclude that there is a statistically significant difference between the life satisfaction of older adults and middle-aged adults. This is evidenced by the t-value of 2.03 and p-value of .047, which fall below the standard cutoffs for statistical significance. The 95% confidence interval also supports this conclusion, as it does not include zero.

B. Based on these results, Jack should reject the null hypothesis and accept the alternative hypothesis that there is a difference in life satisfaction between older adults and middle-aged adults.

C. The "t(58) = 2.03" indicates the t-value of the statistical test, which is a measure of the difference between the means of the two groups divided by the standard error of that difference. In this case, the t-value of 2.03 suggests that the difference in life satisfaction between the two groups is larger than would be expected by chance.

D. The confidence interval tells us that there is a 95% chance that the true difference in life satisfaction between the two groups falls within the range of 0.01 to 1.59. This suggests that the difference between the two groups is likely not due to chance.

E. The effect size (d = .52) tells us that the difference in life satisfaction between the two groups is moderate in magnitude. This suggests that the difference is not only statistically significant but also practically meaningful.

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Answer:

B(2.75,2.5)

Step-by-step explanation:

B(x,y)

Bx= Ax+Cx 1 + 4.5 5.5

---------- = -------------- = --------- = 2.75

2 2 2

By = Ay+Cy 1 + 4 5

---------- = ----------- = ---------- = 2.5

2 2 2

coordinates of point B(2.75,2.5)

The average cost of all seats in the theater is $10.71

Given:

cost per seat x    number of available seats f        x × f

$5                                         22                                 110

$10                                        14                                  140

$15                                        10                                  150

$20                                       10                                  200

.........................................................................................................

Sum                                      56                                  600

..........................................................................................................

average cost of all seats = (sum of x × f) /sum of number of available seats

average cost of all seats = 600/ 56 = $10.71

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Intellectually gifted people score in the top 1 - 2percent on a standard IQ test.

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

IQ of intellectual gifted people

The general rule is that

People with intellectuals are usually ranked high and the range is usually small

Next, we test the options

A. 10

The top 10% has a high range

B. 5-10

The top 10% omits people in top 5%

C. 5

The top 5% has a high range

D. 1-2

This has a small range and it is the highest

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1) (a) The transformations that occur from the parent function are horizontal translation of 2 units to the left and vertical translation of 4 units to the down.

(b) (-2, -4)

(c) Graph is given below.

1) Given a function,

g(x) = (x + 2)² - 4

(a) Given a parent function p(x) = x².

We can write g(x) as,

g(x) = p(x + 2) - 4

So the transformation is horizontal translation of 2 units to the left and vertical translation of 4 units to the down.

(b) Vertex formula of a parabola is,

y = a (x - h)² + k, where (h, k) is the vertex.

Comparing the given function with vertex form,

Vertex of the parabola = (-2, -4)

(c) Graph of g(x) will be a parabola with vertex at (-2, -4).

It is given below.

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To predict whether a spontaneous redox reaction will occur when a nickel (II) nitrate solution is mixed with a tin (II) sulfate solution, we can compare the reduction potentials of the involved species.  it is not possible to determine the spontaneity of the reaction.

If the reduction potential of the oxidizing species is greater than the reduction potential of the reducing species, a spontaneous redox reaction will occur.

First, let's write the half-reaction  equations for the oxidation and reduction processes:

Oxidation: Sn^2+ (aq) → Sn^4+ (aq) + 2e^-

Reduction: Ni^2+ (aq) + 2e^- → Ni (s)

The standard reduction potentials for these half-reactions can be found in a standard reduction potentials table. By comparing the reduction potentials, we can determine the spontaneity of the reaction.

If the reduction potential of the oxidizing species (Sn^2+ → Sn^4+) is greater than the reduction potential of the reducing species (Ni^2+ → Ni), then the reaction will proceed spontaneously. Otherwise, if the reduction potential of the oxidizing species is lower than the reduction potential of the reducing species, the reaction will not occur spontaneously.

Without specific values for the reduction potentials, it is not possible to determine the spontaneity of the reaction.

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Step-by-step explanation:

the y intercept is found by equating X to 0

hence, y = 3

answer is: (0,3)

Answer:

( f + g) (x) = –2x + 6 ( f – g) (x) = 8x – 2 ( f × g ) (x) = –15x 2 + 2x + 8

Step-by-step explanation:

mathh

Answer:

x=9   :))

Step-by-step explanation:

First set up your equation.

"3 times" is multiplication

"THE SUM of A NUMBER and seven" that is parenthesis because of the multiplication before it

"is increased by ten" that is an addition at the end

Now we have 3(x+7)+10=4

Solve your equation!

Distribute the 3 now we have 3x+21+10=4

Add like terms

now it should look like this... 3x+31=4

Subtract 31 from both sides and it looks like...

3x=27

Divide by the x-value

x=9

The value of the number will be -9.

What is an expression?

Expression in math is defined as the collection of the numbers, variables and functions by using signs like addition, subtraction, multiplication, and division.

Given that;

The word expression is;

''Three times the sum of a number and seven is increased by ten, the result is four. ''

Now, Let a number be x.

Then, we can formulate the expression as;

3 (x + 7) + 10 = 4

Solve the expression for x as;

3 (x + 7) + 10 = 4

3x + 21 + 10 = 4

3x + 31 = 4

3x = 4 - 31

3x = -27

x = -9

Thus, The value of the number will be -9.

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In the given model of Earth, the Moon, and the Sun, number 1 represents the Moon, number 2 represents Earth, and number 3 represents the Sun.

Based on the provided information, we can interpret the model as a representation of the positions of the Moon, Earth, and the Sun. In this context, number 1 corresponds to the Moon, number 2 represents Earth, and number 3 represents the Sun.

The Moon is the natural satellite orbiting around Earth, and it plays a significant role in various natural phenomena such as tides. Earth, represented by the number 2, is the planet we inhabit and is located between the Moon and the Sun. The Sun, represented by the number 3, is the star at the center of our solar system, providing light, heat, and energy to Earth.

By understanding the roles and positions of the Moon, Earth, and the Sun in this model, we can better comprehend their relationships and interactions within the context of the solar system.

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Answer:

B & D

Step-by-step explanation:

The question has already been answered soooo :>

Answer:

first question : 3 / 1/4 ( 3 over 1/4 )

second : 3/1/4 = 12

Step-by-step explanation:

i dont know, i just got it right on iready

Answer:

Which fraction represents Lena's speed in miles per hour?

Answer = 3 / 1/4 (three over one fourth)

What is Lena's speed in miles per hour?

Answer = 3 / 1/4 = 12 (three over one fourth equals twelve)

Step-by-step explanation:

i did it on iread and got it right C;

The distance from Sang to Jazmin is approximately 101.00 yards.

To calculate the distance from Sang to Jazmin on the rectangular soccer field, we can use the Pythagorean theorem:

Distanc\(e^2\) = (Distance along the goal line\()^2\) + (Distance along the adjacent side\()^2\)

Distanc\(e^{2}\) = 2\(0^2\) + 9\(9^2\)

Distanc\(e^2\) = 400 + 9801

Distanc\(e^2\) = 10201

Taking the square root of both sides, we get:

Distance = √10201

Distance ≈ 101.00 yards

Therefore, the distance is approximately 103 yards.

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Answer:

a) -0.4

b) 2.5

c) 0.125

d) 1.5

Step-by-step explanation:

The total surface area of a rectangular prism with a base of 7, a height of 9, and another height of 3 can be calculated. The specific value will be provided in the explanation.

To find the total surface area of a rectangular prism, you need to calculate the sum of the areas of all its faces. A rectangular prism has six faces: a top face, a bottom face, two side faces, a front face, and a back face.

To calculate the area of each face, you multiply the length of one side by the length of an adjacent side. Given that the base has a length of 7, the height has a length of 9, and another height has a length of 3, you can calculate the areas of the faces.

The top and bottom faces have areas of 7 * 9 = 63 square units each. The two side faces have areas of 7 * 3 = 21 square units each. The front and back faces have areas of 9 * 3 = 27 square units each.

To find the total surface area, you add up the areas of all the faces: 63 + 63 + 21 + 21 + 27 + 27 = 222 square units.

Therefore, the total surface area of the rectangular prism is 222 square units.

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Damian's percent error for the estimate of the time that Lily would play is of 47.37%.

The percent error is obtained applying the proportions in the context of the problem.

A proportion is applied as the percent error is given by the difference between the estimate and the actual value, divided by the actual value, and multiplied by 100%.

The parameters for this problem are given as follows:

Hence the percent error is given as follows:

P = (38 - 20)/38 x 100%

P = 47.37%.

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The length of the path described by the parametric equations x = cos(3t) and y = sin(3t) for 0 ≤ t ≤ π/2 is 3(π/2).

To find the length of the path, we need to use the formula for arc length:

L = integral from a to b of √(dx/dt)² + (dy/dt)² dt

where a and b are the starting and ending values of t.

Here, we have x = cos(3t) and y = sin(3t). Therefore,

dx/dt = -3sin(3t) and dy/dt = 3cos(3t)

Now, we can substitute these into the formula for arc length:

L = integral from 0 to π/2 of √((-3sin(3t))² + (3cos(3t))²) dt

L = integral from 0 to π/2 of √(9sin²(3t) + 9cos²(3t)) dt

L = integral from 0 to pi/2 of 3 dt

L = \(3[t]_0^{(\pi/2)\) = 3(pi/2)

The length of the path described by the parametric equations x = cos(3t) and y = sin(3t) for 0 ≤ t ≤ π/2 is 3(π/2).

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The length of the path described by the parametric equations x = cos(3t) and y = sin(3t), for 0 ≤ t ≤ π/2, is given by the integral of the square root of the sum of the squares of the derivatives of x and y with respect to t.

Using the Pythagorean identity sin²θ + cos²θ = 1, we can simplify the length integral as follows:

L = ∫[0,π/2] √((dx/dt)² + (dy/dt)²) dt

L = ∫[0,π/2] √((-3sin(3t))² + (3cos(3t))²) dt

L = ∫[0,π/2] √(9sin²(3t) + 9cos²(3t)) dt

L = ∫[0,π/2] √9(dt)

L = 3 ∫[0,π/2] dt

L = 3[t] [0,π/2]

L = 3(π/2 - 0)

L = 3π/2

Therefore, the length of the path described by the given parametric equations for 0 ≤ t ≤ π/2 is 3π/2 units.

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Complete Question

the length of the path described by the parametric equations x=cos3t and y=sin3t , for 0≤t≤π2 is given by                   .

The final polynomial equation after synthetic division is \(x^5-3x^4-81x+243\)

We need to solve;

Put the solution in the appropriate spot on the grid after using synthetic division to divide the following polynomial. Respond with descending powers of x.

The polynomial equation given is;

\(\left(x^4-81\right)\left(x-3\right)\)

By using synthetic division;

⇒ \(x^4x+x^4\left(-3\right)-81x-81\left(-3\right)\)

    \(x^5-3x^4-81x+243\)

→ The required final equation in descending powers of x is \(x^5-3x^4-81x+243\) .

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Answer:

The answer is 47