A rocket is launched from atop a 55-foot cliff with an initial velocity of 138 ft/s. a. Substitute the values into the vertical motion formula h = −16t2 + vt + c. Let h = 0. b. Use the quadratic formula find out how long the rocket will take to hit the ground after it is launched. Round to the nearest tenth of a second.

Answers

Answer 1
It would take 9 seconds.

Substituting the values into the equation, we have:
 
0 = -16t² + 138t + 55

The quadratic formula is:
[tex]t=\frac{-b\pm \sqrt{b^2-4ac}}{2a}[/tex]

Inserting our information we have:
[tex]t=\frac{-138\pm \sqrt{138^2-4(-16)(55)}}{2(-16)} \\ \\=\frac{-138\pm \sqrt{19044--3520}}{-32} \\ \\=\frac{-138\pm \sqrt{19044+3520}}{-32} \\ \\=\frac{-138\pm \sqrt{22564}}{-32} \\ \\=\frac{-138\pm 150}{-32}=\frac{-138+150}{-32}\text{ or } \frac{-138-150}{-32} \\ \\=\frac{12}{-32}\text { or } \frac{288}{32}=-0.375 \text{ or } 9[/tex]

Related Questions

Paul has a tack stuck in his four-wheeler tire. If the tire has a diameter of 36 inches, how far does the tack travel in 62° of rotation?

A. 31π

B. 18π

C. 31 pi over 5

D. 31 pi over 90,

Answers

C. 31 pi over 5

~sbcardinals :)

hello there

your answer would be

C, 31 pi over 5

hope it helps

thank you

best regards Queen Z

What is the value of x?

Answers

x/10 = 10/4x
4x^2  = 100
  x^2 = 25
     x = 5

answer
5 units

What are the zeros of f(x) = 4x^2 - 12x + 8 (I need a clear explanation on how to solve it)

Answers

The zero of the quadratic function is therefore x = 1. Since both factors give the same zero, we have a repeated zero and f(x) only touches the x-axis at one point, x = 1.

The zeros of the quadratic function f(x) = 4x^2 - 12x + 8 are the values of x that make f(x) = 0. In this function, we can factor by finding two numbers that multiply to give the constant term (8 times 4, the coefficient of x^2) and add to give the coefficient of x (-12). Here, those numbers are -4 and -4, so we rewrite the middle term -12x as -4x - 4x, and factor by grouping:

4x^2 - 4x - 4x + 8 = 0

4x(x - 1) - 4(x - 1) = 0

(4x - 4)(x - 1) = 0

Now we have two factors equal to zero, which gives us two equations to solve:

4x - 4 = 0 or x - 1 = 0

x = 1

Line r passes through points (2, 11) and (10, 4). Line s is perpendicular to r. What is the slope of line s?

Answers

Answer: 8/7

------------------------------------------------------

Work Shown:

Use the slope formula to find the slope of line r
m = (y2-y1)/(x2-x1)
m = (4-11)/(10-2)
m = -7/8

The slope of line r is -7/8

Now we take the negative reciprocal. In other words, we flip the fraction and flip the sign from negative to positive.

Flip the fraction: -7/8 ---> -8/7
Flip the sign: -8/7 ----> +8/7

The slope of line s is 8/7

Note how multiplying the slope of line r (-7/8) and the slope of line s (8/7) yields -1. Multiplying any two perpendicular slopes leads to a product of -1. This is excluding vertical lines as the slope is undefined. 

Part 1.] Identify the transformations that describe the graph of an odd function. Select all that apply.

reflection over the x-axis;
reflection over the y-axis;
reflection over the line y = x;
90° rotation around the origin;
180° rotation around the origin

Part 2.] Prove that if f(x) and g(x) are both even functions, then h(x) = f(x) + g(x) is an even function.

Answers

Hello,

1) A odd function has the propriety f(-x)=-f(x)
Answer E

2)
if f(x) is even f(x)=f(-x)
if g(x) is even g(x)=g(-x)

h(x)=f(x)+g(x)=(f+g)(x)
h(-x)=(f+g)(-x)=f(-x)+g(-x)=f(x)+g(x)=(f+g)(x)=h(x)

h(x) is even

How far does a ball that is hit from a height of 3 feet at a speed of 120 feet per second travel before it hits the ground if it is hit at an angle of 45 degrees? Round your answer to the nearest integer.

A) 376 Feet
B) 395 Feet
C) 426 Feet
D) 453 Feet

Answers

Selection D is appropriate.

It is convenient to solve for the time of flight, then compute the distance traveled in that time. The ball is in the air about 5.338 seconds.

which statement can be proved if you are given that SK≌LR?

Answers

Answer:

C

Step-by-step explanation:

The correct answer is  C.[tex]$\overline{SL}\cong\overline{KR}$[/tex]

Given that [tex]$\overline{SK}\cong\overline{LR}$[/tex] , we can see that triangle SKL is congruent to triangle LRP by the Side-Side-Side (SSS) congruence postulate. This means that all corresponding sides and angles of the two triangles are congruent.

Since [tex]$\overline{SK}\cong\overline{LR}$[/tex]is given, we know that [tex]$\overline{SL}\cong\overline{KR}$[/tex] must also be true.  The other answer choices do not necessarily follow from the given information.

The complete question is: Which statement can be proved if you are given that SK≌LR?

I need help with this

Answers

16: 10(-9) +4 = -90 +4 = -86

17. 7^2 - 7 = 49-7 = 42

18. -9^2 - -9 = 81+9 = 90

19. 10(5) +4 = 54, 3*54 = 162

20. 3*5 = 15, 10(15) +4 = 154

Choose the situation that represents a function. The number of raisins in an oatmeal raisin cookie is a function of the diameter of the cookie. The inches of rainfall is a function of the day’s average temperature. The time it takes to cook a turkey is a function of the turkey’s weight. The number of sit-ups a student can do in a minute is a function of the student’s age.

Answers

Answer: The time is takes to cook a turkey is a function of the turkey's weight.

In a function, there is an input and there is an output. The idea of a function is that each individual input is changed into an output.

The time it takes to cook a turkey depends on the size of the turkey.
Smaller turkeys would take less time to cook and larger turkeys would take longer to cook.

So if you start with the turkeys weight, you could determine how long it would need to cook. This is an example of a function.

The time it takes to cook a turkey is a function of the turkey’s weight. Then the correct option is C.

What is a function?

A statement, principle, or policy that creates the link between two variables is known as a function. Functions are found all across mathematics and are required for the creation of complex relationships.

Choose the situation that represents a function.

An intake and an outlet are both present in a function. Each unique supply is converted into a result as per the concept of a function.

The amount of the turkey determines how long it will take to cook.

Oversized turkeys will take longer to prepare than smaller turkeys, and vice versa.

The time it takes to cook a turkey is a function of the turkey’s weight.

Then the correct option is C.

More about the function link is given below.

https://brainly.com/question/5245372

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Tom caught 4 fish and his son caught 12 fish.

The number of fish that Tom caught was what percent of the number of fish that his son caught?

Answers

Hi there!

To solve this problem, we need to divide 4 by 12.

4 ÷ 12 = 1/3
1/3 = 33.33%

Hope this helps!

Jalen traded $4100 for Mexican pesos, immediately changed his mind, and then promptly traded his Mexican pesos back into dollars. Which of these amounts is he most likely to have?

A. More than $0 but less than $4100
B. $0
C. $4100
D. More than $4100

Answers

the answer is the option A.) More than $0 but less than $4100

Because, when currency is exchanged for another currency, the bank or trader usually charges commission for changing it.

APEX APEX APEX APEX APEX APEX APEX APEX APEX APEX

More than $0 but less than $4100

Which pair of times has the longest elapsed time between the two times?
3:05 to 9:40
8:35 a.m. to 2:35 p.m.
4:25 to 10:45
7:10 p.m. to 1:40 a.m.

What is the elapsed time between 9:30 p.m. and 2:15 a.m.?

7 hours and 45 minutes
5 hours and 15 minutes
4 hours and 45 minutes
4 hours and 15 minutes

Subtract 1 hour, 50 minutes from 4 hours, 10 minutes.

2 hours, 20 minutes
2 hours, 40 minutes
3 hours, 40 minutes
3 hours, 30 minutes

Answers

a) 9:40 -3:05 = 6:35 . . . . . the longest time interval
.. 14:35 -8:35 = 6:00
.. 10:45 -4:25 = 6:20
.. 13:40 -7:20 = 6:30


b) 14:15 -9:30 = 5:(-15) = 4:45 (3rd selection)

c) 4:10 -1:50 = 3:(-40) = 2:20 (1st selection)

(50 PTS) NEED HELP FAST ILL MARK BRAINLIEST AND RATE 5 STARS AND SAY THANK YOU

A tournament organizer recorded the number of people in different age groups who participated in the archery tournament. He then created the following histogram:Which of the following statements best compares the height of the bars of the histogram?

A.) There are more participants in the 20–39 age group than in the 0–19 and 60–79 groups combined.

B.) There are more participants in the 20–39 age group than in the 40–59 and 0–19 groups combined.

C.) There are twice as many participants in the 40–59 age group than in the 60–79 age group.

D.) There are twice as many participants in the 0–19 age group than in the 60–79 age group.

Answers

Where is the histogram?

Answer:

d

blessed have one



Consider the function y = 1.05(x/12), which represents the growth of capital in a bank account.

The annual interest is __%,
a. 12
b. 105
c. 1.05
d. 5
and the bank compounds the interest__ .
a. annually
b. continuously
c. daily
d. monthly

The balance of the account will grow __ .
a. logarithmically
b. exponentially
c. asymptotically
d. linearly

Answers

1) is A
2) is D
3)is D

Answer:

The annual interest is,

Option d is correct

5%

The bank compounds the interest_

Option a is correct.

Annually.

The balance of the account will grow,

Option b is correct

exponentially

Step-by-step explanation:

Exponential growth function is given by:

[tex]y=(1+r)^x[/tex]            .....[1]

where,

r is the annual interest in decimal

x is the number of periods.

As per the statement:

Consider the function:

[tex]y=(1.05)^{\frac{x}{12}}[/tex] where, x represents the time in months.

On comparing with [1] we have;

[tex]1+r = 1.05[/tex]

Subtract 1 from both sides we have;

r = 0.05 = 5%

The annual interest is, 5%

and

the bank compounds the interest annually.

The balance of the account will grow exponentially

Kevin goes fishing every Saturday. The table below shows the number of fish he caught each week for the last six weeks.

Fish Caught

Week Number of Fish
1 4
2 0
3 2
4 8
5 4
6 6

What is the mean absolute deviation of the data above?
A. 8
B. 2
C. 4
D. 1

Answers

I believe the answer is C

Can someone graph it for me and answer a or b???

Answers

First differences are all 7.3. You don't need a graph to know that is a linear function.

Help Help Help!!! :)
solve the system of equations y=2x^2-3 y=3x-1

Answers

Solution:  
y = 2x^2 - 3 ---- equation 1
 y = 3x - 1 ------equation 2 
 Then we get, 
 2x^2 - 3 = 3x - 1 
 Now, simplifying the equation, we get 
 2x^2 - 3x - 3 + 1 = 0
 2x^2 - 3x - 2 = 0 
 After factoring the equation, we get
 (2x+1)(x-2) = 0 
 So, this means
 (2x+1) = 0 and (x-2) = 0 
 From this, we get 
 x = -1/2 and x = 2 
 Putting values of x = -1/2 in equation 2 
 y = 3(-1/2) - 1
 y = -2.5 
 Now, putting value of x = 2 in equation 2 
 y = 3(2) -1
 y = 5

Can anyone help me!?!?!?!?! Here is my question:
Compare the functions shown below:
f(x) = 4 sin (2x − π) - 1
g(x)

x y
-1 6
0 1
1 -2
2 -3
3 -2
4 1
5 6
h(x) = (x − 2)2 + 4

Which function has the smallest minimum y-value?,

Answers

The sine function has a minimum value of -1, so f(x) = 4sin( ) -1 will have a minimum value of -5.

g(x) obviously has a minimum value of -3.

h(x) has a squared term that cannot be negative, so its minimum value is +4.


f(x) has the smallest minimum value.

Using the given equation find the missing coordinates of the points and then find the slope of the line for each equation y=3.5x+4; a(...; 5), b(10; ...)

Answers

A(2/7:5)

B(10:39)

The slope is 7/2.

The slope of the line y=3.5x+4 is 3.5, and the missing coordinates will be filled as a(0.28, 5) and b(10, 9)

What is Slope of Line?

The slope of the line is the ratio of the rise to the run, or rise divided by the run. It describes the steepness of line in the coordinate plane.

The slope intercept form of a line is y=mx+b, where m is slope and b is the y intercept.

The slope of line passing through two points (x₁, y₁) and (x₂, y₂) is

m=y₂-y₁/x₂-x₁

The given equation of line is y=3.5x+4

When we compare this with slope intercept form y=mx+b.

slope m=3.5

We need to find the value of x when y is 5

5=3.5x+4

1=3.5x

Divide both sides by 3.5

x=0.28

So a coordinates are (0.28, 5)

Now let us find y value when x is 10

y=3.5(10)+4

y=39

So b coordinates are (0.28, 39)

Hence, the slope of the line y=3.5x+4 is 3.5, and the missing coordinates will be filled as a(0.28, 5) and b(10, 9)

To learn more on slope of line click:

https://brainly.com/question/14511992

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If A(0, 0), B(3, 3), C(9, 3), and D(6, 0) are the vertices of a quadrilateral, do the points form a parallelogram? Justify your answer.

A. Yes, it is a parallelogram because the slope of segment AB equals the slope of segment DC, which equals 1, and AB = DC = square root of 18.

B. Yes, it is a parallelogram because the slope of segment AB equals the slope of segment DC, which equals −1, and AD = CD = 3 units.

C. Yes, it is a parallelogram because the midpoint of the diagonals of segment AC and segment BD is (4.4, 1.5).

D. No, it is not a parallelogram because the slope of segment AB = 1 and the slope of segment DC = −1.

Answers

here's the picture of the quadrilateral
it's a parallelogram but I'm not completely sure about the answer
I think that C is the correct answer
the picture can help you to find the answer.
hope this helps

Each test grade in Sara's science class counts for 1/6 of the final grade. The final exam counts for 1/2. Sara's test scores are 72, 84, and 90. Her final exam score is 90.

What is Sara's final grade for the class?
A) 83
B) 86
C) 87
D) 89,

Answers

Multiply each test by its respective weight and add the results. 72*(1/6) = 12 84*(1/6) = 14 90*(1/6) = 15 90*(1/2) = 45. 12+14+15+45= 86, so answer B is correct.

Evaluate the function below for x = 2 F(x) = 4x3 - x2 - 5x + 7

Answers

The answer to this question is 25.

Answer:

The value of the given function is 25 for x = 2.

Step-by-step explanation:

Given function is,

[tex]F(x) = 4x^3 - x^2 - 5x + 7[/tex]

At x = 2,

The value of the function is,

[tex]f(2)=4(2)^3-(2)^2-5(2)+7[/tex]

[tex]=4(8)-4-10+7[/tex]

[tex]=32 - 7[/tex]

[tex]=25[/tex]

Hence, the value of the given function is 25 for x = 2.

HELP ASAP WILL MARK AS BRAINILEST TO WHOEVER GETS IT RIGHT

Answers

The correct answer is B. For sure it is. It took a while to solve in my head

What is the slope-intercept form for each equation in this system? Compare the slopes and y-intercepts to describe the graph of the system. 3x - 4y = 28 4x + 10y = 20 A) y = 3 4 x − 7; y = −2 5 x + 2; one line B) y = - 3 4 x − 7; y = −2 5 x + 2; parallel lines Eliminate C) y = 3 4 x − 7; y = 2 5 x + 2; intersecting lines D) y = 3 4 x − 7; y = −2 5 x + 2; intersecting lines

Answers

3x - 4y = 28
 4x + 10y = 20
 First we rewrite the system of equations:
 Equation 1:
 3x - 4y = 28
 3x - 28 = 4y
 (3/4) x - 7 = y
 Equation 2:
 4x + 10y = 20
 10y = 20 - 4x
 y = 2 - (2/5) x
 We have then:
 y = (3/4) x - 7
 y = - (2/5) x + 2
 One line has a positive slope and the other line has a negative slope.
 Thus, both lines are connected.

 Answer: 
 D) y = 3/4 x - 7; y = -2/5 x + 2; intersecting lines

The slope - intercept form of the equations are : [tex]y = \frac{3}{4} x - 7 [/tex] and [tex]y = - \frac{2}{5} x + 2[/tex]

Given the standard form of the equations :

3x - 4y = 28 - - - - (1)

4x + 10y = 20 - - - - - (2)

The General form of a slope - intercept equation :

y = bx + c

For equation (1) :

3x - 4y = 28

Make y the subject

-4y = 28 - 3x

Divide both sides by - 4 to isolate y

y = -7 + 3/4x

[tex]y = \frac{3}{4} x - 7 [/tex]

For equation (2) :

4x + 10y = 20

Make y the subject

10y = 20 - 4x

Divide through by 10 to isolate y

y = 2 - 2/5x

[tex]y =- \frac{2}{5} x + 2[/tex]

Hence, the slope - intercept equations are : [tex]y = \frac{3}{4} x - 7 [/tex] and [tex]y = - \frac{2}{5} x + 2[/tex]

Learn more :

For what values of b will F(x) = logb x be an increasing function?

A. b < 0
B. b > 0
C. b < 1
D. b > 1,

Answers

In order to answer you need to keep in mind what is a logarithm:
logb x = n is the equivalent of asking "you should raise the base b to what number n in order to get x?": bⁿ = x

From this follows that b must be positive, otherwise the function is not defined everywhere in R: for example, take log(-2) x = 0.5 ? This means: [tex] (-2)^{1/2} [/tex] =√(-2) which is impossible in R. 
Therefore, both answers A and C are not correct because they take in consideration negative values.

If we take the base between 0 and 1 excluded, we have a fraction whose denominator is bigger than the numerator. Such a fraction, elevated to increasing exponents get smaller, for example:
(1/2)² = 1/4
(1/2)³ = 1/8
(1/2)⁴ = 1/16
Therefore the function is dereasing and answer B is incorrect.

The right answer is, therefore, D) b > 1.

Final answer:

The logarithmic function F(x) = logb x is an increasing function when the base b is greater than 1, because the value of logb x increases as x increases for b > 1.(Option D)

Explanation:

The question asks for what values of b will F(x) = logb x be an increasing function. To determine this, we need to understand the behavior of logarithmic functions based on their base value (b). A logarithmic function is increasing if the base of the logarithm is greater than 1. This is because as x increases, the value of logb x increases when b>1. Conversely, if b<1 (but b>0), the function is decreasing because the power to which b must be raised to produce x decreases as x increases. We also know that the base of a logarithm cannot be negative or zero, as this would not produce a valid logarithmic function.

Therefore, the correct answer is D. b > 1, where the logarithmic function F(x) = logb x is an increasing function.

The ____ is the vertical number line on the coordinate grid

Answers

Hi there!

The y axis is the vertical number line on the coodinate grid.

Hope this helps!

-7x^6*(-2x^8) will mark as brainiest


SIMPLIFY!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
DO NOT SOLVE FOR X

Answers

simplified to 14x^14

50 POINTS!!!!! HELPFor the exponential function f(x)=a^x,a>0,a≠1 what is the domain? what is the range?

Answers

I have included a graph to help you see what the domain and range would be
There are no minus y values. 
0<y< infinity y is included in the reals.
The domain is 
- infinity < x < infinity.

I don't want to say that either x or y can equal - or + infinity. Some teachers allow it. You have to ask your instructor what they will accept.

The blue line is y = 4^x
The red line is y = 2^x  

Please help!! Show your work !!

Answers

Use Pythagorean theorem:
34^2+41^2=X^2
1156+1681=x^2
2837=X^2
√2837=x
x=53.26 that are the distance from A to B
Add 34+ 41= 75
Subtract to find distance saved----------- 75-53.26= ANSWER: 21. 74 meters





If 5x-4=26 what does the x equal

Answers

x would be 6 because 5x is 5 x 6 - 4
5x - 4 = 26

------------------------------------------------
Add 4 to both sides:
------------------------------------------------
5x - 4 + 4 = 26 + 4
5x = 30 

------------------------------------------------
Divide by 5 on both sides:
------------------------------------------------
5x ÷ 5 = 30 ÷ 5
x = 6

------------------------------------------------
Answer: x = 6
------------------------------------------------

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