kelsey goes cliff diving into the ocean. Her height as a function of time can be modeled by the function h(t)=-16t^2+480, where t is the time in seconds and h is the height in feet. How long does it take for Kelsey to reach the water?

Answers

Answer 1

Answer:

to differential calculus, because I don't know how to answer this question without

using it.

We're told that Jason's height above the water is  H(t) = -16t² + 16t + 480 .

We can observe many things from this equation:

-- Up is the positive direction; down is the negative direction.

-- The acceleration of gravity is 32 ft/sec² .

-- Jason jumps upward from the cliff, at 16 ft/sec .

-- The cliff is 480-ft above the water.

(This tells us why the question is only concerned with his maximum height,

and then it ends ... 480-ft is one serious cliff, and what happens after the

peak of his arc is too gruesome to contemplate.)

In any case, his vertical velocity is the first derivative, with respect to time,

of his height above the water.

        V = -32 t + 16

At the peak of his arc, where gravity takes over, his velocity changes from

upward to downward, and it's momentarily zero.

                                          0 = -32t + 16

Add  32t  to each side:    32t = 16

Divide each side by  32:      t = 1/2 second

His height at that instant is     H(0.5) = -16(0.5)² + 16(0.5) + 480 =

                                          4-ft above the cliff,  484-ft above the water,

and then he begins falling from that altitude.

The duration of his dive is      484 = 16 t²

                                                  t = √(484/16) = 5.5 seconds

and he hits the water at      V = a t = (32) x (5.5) = 176 ft/sec = exactly 120 mph

Step-by-step explanation:


Related Questions

1/3+ blank =3/4 plsssss help

Answers

Answer:

= 5 /1 2

Step-by-step explanation:

How many ways can you write one whole as a fraction

Answers

Answer:

infinite

Step-by-step explanation:

you could say 1/1 or 4/4 or 146798245/146798245

any number over itself is a whole

Does that answer it? I feel like I'm missing something

Answer:

Any

Step-by-step explanation:

You can write one whole by making the numerator and denominator the same number. Examples:      2/2      3/3      4/4      5/5      6/6      7/7      8/8      9/9     10/10      100/100      20/20

what is -9 = -6r simplified​

Answers

Answer:

Exact Form:

r = 3/2

Decimal Form:

r = 1.5

Mixed Number Form:

r =1 1/2

Step-by-step explanation:

find the slope of the line of best fit shown below.

Answers

The Answer is A, 1/2

I need help on this question ​

Answers

Answer:

1. equal

2. add to 180

3. equal

4. add to 180

Step-by-step explanation:

as 1 and 3 are linear pairs

2 and 4 are vertically opposite angles

A group of friends were working on a student film. They spent $476 on equipment, which was 85% of their total budget. What was the total budget for their student film?

Answers

By by by the answer is 560

C=5x+4y
What points maximize and minimizes

Answers

Answer: There is no points

Step-by-step explanation:

Can someone answer this

Answers

Irk i 4?! H/Xavier gg y. Ggbjg 674. Hh

Which ordered pair describes the location of the point shown on the
coordinate system below?
10.
10
10
A. (3,-5)
B. (-5,3)
C. (3,5)
D. (-5, -3)

Answers

Your answer is A!

Step-by-step explanation:

Your answer is A!

The coordinate point from the given graph is (3, -5). Therefore, option A is the correct answer.

What is coordinate plane?

A coordinate plane is a two-dimensional surface formed by two number lines. It is formed when a horizontal line (the X-axis) and a vertical line (the Y-axis) intersect at a point called the origin. The numbers on a coordinate grid are used to locate points.

From the given coordinate plane, the coordinate point lies in fourth quadrant.

Where, x-coordinate is positive and y-coordinate is is negative.

The coordinate point correspond to x-axis is 3 and coordinate point correspond to y-axis is 5.

So, the coordinate point is (3, -5)

Therefore, option A is the correct answer.

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A corporate team-building event cost $7, plus an additional $2 per attendee. How many attendees can there be, at most, if the budget for the corporate team-building event is $17?
Pls answer fast thank you

Answers

Answer:

5

Step-by-step explanation:

17-7=10

2x5=10

Find the volume of the cone.
Either enter an exact answer in terms of # or use 3.14 for and round your final answer to the nearest hundredth.

Answers

Answer:

v ≈ 78.54

Step-by-step explanation:

v = π [tex]r^{2}[/tex]  [tex]\frac{h}{3}[/tex]

so v ≈ 78.54

calculate 3(8-6)
[tex]3(8 - 6)[/tex]

Answers

Answer:

6

Step-by-step explanation:

3(8−6)

=(3)(2)

=6

Answer:

3(8-6)=6

Step-by-step explanation:

8-6

=2

=3*2

=6

Find the value of x and y

Answers

Answer:

X is 90 y is 43

Step-by-step explanation:

What is the BEST first step in converting the standard equation below to slope intercept form?
x + 2y = 4

Answers

Subtract x

Then divide by 2

What is the range for the third size of the triangle 13,24?

Answers

Answer:

third side range

5

<

C

<

11

Step-by-step explanation:

10. Select all of the phrases that could be represented by the algebraic expression 2k - 4
a. The difference between number k and 4

b. 4 fewer than the product of 2 and a number k

c. The product of 2 and the quantity 4 and a number k

d. 4 less than 2 times a number k

Answers

i think the answer would be d


A rectangle is a parallelogram. What is true of the diagonals of a rectangle
that is not true of the diagonals of a parallelogram, in general?

Answers

Answer:diagonals of rectangle are equal in length while diagonals of a parallelogram can be different lengths

Step-by-step explanation:

What is true of a rectangle that is not true of a parallelogram is that; the diagonals of a rectangle are equal but the diagonals of a parallelogram are not equal.

We are dealing with rectangles and parallelogram here.

Now, both rectangle and parallelogram have 4 sides respectively with 2 of the sides being equal.

Now, for a rectangle, the diagonals are always equal because all the internal angles are equal.

However, for a parallelogram, all the internal angles are not equal and as such the diagonals are also not equal.

In conclusion, what is true of a rectangle that is not true of a parallelogram is that the diagonals of a rectangle are equal but the diagonals of a parallelogram are not equal.

Read more about diagonals of Quadrilaterals at; https://brainly.com/question/25806235

MATH HELP WILL MARK BRANLIEST
In a certain Algebra 2 class of 21 students, 10 of them play basketball and 9 of them play baseball. There are 8 students who play neither sport. What is the probability that a student chosen randomly from the class plays both basketball and baseball?

Answers

Answer:

6/21 or 2/7

Step-by-step explanation:

on delta math

An arts academy requires there to be 5 teachers for every 125 students and 4 tutors for every 88 students. How many students does the academy have per teacher? per tutor? How many tutors does the academy need if it has 81 students? Pleaseee help​

Answers

Answer:

25 students peer teacher, 22 students per tutor, 4 tutors for 81 students

Step-by-step explanation:

You need to find the unit rate,

for the teachers, to find the unit rate would be 125 divided by 5. For tutors it would be 88 divided by 4.

Then to find how many tutors you need for 81 students you would need 4 tutors because you want to divide 81 by the unit rate we got (22), and since the answer would be a decimal (3.68.....) you would need to round the whole number up to four because you cant have a decimal of a person.

A right angled triangular prism has length 3m, breadth 2m and height 2.5m. If the mass of the prism is 3.4kg, find its density​

Answers

Answer:

The density of the prism is 0.453 kilograms per cubic meter.

Step-by-step explanation:

Let suppose that mass in the prism is uniformly distributed. Then, the definition of density ([tex]\rho[/tex]), in kilograms per cubic meter, is defined by the equation below:

[tex]\rho = \frac{m}{V}[/tex] (1)

Where:

[tex]m[/tex] - Mass, in kilograms.

[tex]V[/tex] - Volume of the right angle triangle prism, in cubic meters.

Besides, the volume of the right angle triangle prism is:

[tex]V = \frac{1}{2}\cdot b\cdot h\cdot l[/tex] (2)

Where:

[tex]b[/tex] - Breadth of the base, in meters.

[tex]h[/tex] - Height of the base, in meters.

[tex]l[/tex] - Length of the base, in meters.

If we know that [tex]b = 2\,m[/tex], [tex]h = 2.5\,m[/tex], [tex]l = 3\,m[/tex] and [tex]m = 3.4\,kg[/tex], then the density of the prism is:

[tex]V = 7.5\,m^{3}[/tex]

[tex]\rho = 0.453\,\frac{kg}{m^{3}}[/tex]

The density of the prism is 0.453 kilograms per cubic meter.

The number 70 is decreased to 41. What is the percentage by which the number was decreased, to the nearest tenth of a percent?

Answers

Answer:

Decreased percent = 41.4 % (Approx.)

Step-by-step explanation:

Given:

Old number = 70

New number = 41

Find:

Decreased percent

Computation:

Decreased number = 70 - 41

Decreased number = 29

Decreased percent = [29 / 70]100

Decreased percent  = 41.42%

Decreased percent = 41.4 % (Approx.)

Suppose a coordinate plane contains line l, line m, line p, and line q. If all that is known is that line l is parallel to line m, and line p is parallel to line q, which of these statements must be true after all of the lines are reflected across the y–axis. Select two that apply.
Line l is parallel to line m.
Line l is parallel to line p.
Line m is parallel to line q.
Line l is parallel to line q.
Line m is parallel to line p.
Line p is parallel to line q.

Answers

Answer:

A and E

Step-by-step explanation:

After all of the lines are reflected across the y-axis, the true statements are Line l parallels Line m, and Line m parallels Line p.

What is meant by Parallel lines?Parallel lines are two lines in the same plane that are equal distance apart and never intersect. Real-world parallel line examples include railroad tracks, sidewalk edges, street markings, zebra crossings, the surface of pineapple and strawberry fruit, staircases and railings, and so on.Parallel lines are lines in a plane that never meet, no matter how far they are extended. The distance between the parallel lines is constant because they never meet. Parallel lines are defined as lines that do not intersect or meet at any point in a plane. They are always parallel and equidistant from one another.

To learn more about Parallel lines, refer to:

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Angela invests $2,550 at 3% interest compounded annually. What will be the balance in the account after 1.5 years?

Answers

Answer:

$ 2,665.61

Step-by-step explanation:

I plugged it into a compound interest calculator

Rectangular Prism lateral and total surface area

Answers

Answer:

give me sec waitttttttt give me sec is their any answer choice

which function is equivalent to
f(x) = -4 (x+7)^2 - 6

Answers

Answer:

A

Step-by-step explanation:

-4(x^2+14x+49)-6

-4x^2-56x-196-6

-4x^2-56x-202

Answer:

F(x)=-4x^2 - 56x - 202

Step-by-step explanation:

Two families planned to go to the zoo. The entry ticket for one adult was $7.31 and the entry ticket for one
child was $5.66. There were two adults in the group. The families intend to spend no more than
$46.00. What is the greatest number of child tickets that can be purchased?

Answers

Answer:

5 children

Step-by-step explanation:

$7.31 x2 = $14.62

$46- 14.62 =$32

5.66 divided by 5 = 28.3

5.66 divided by 6 = 33

and $33 is bigger than $31

So the greatest number of children tickets can be purchased is only 5.

Answer:

5 children

Step-by-step explanation:

Solve

$7.31 x2 = $14.62

$46 - 14.62 =$32

5.66 divided by 5 = 28.3

5.66 divided by 6 = 33

$33 is bigger than $31

Therefore, the greatest number of children tickets can be purchased is only 5.

Dan took out a 24-year loan for $111,000 at an APR 0f 7.7%, compounded monthly, while Forrest took out a 24-year loan for $96,000 at an APR of 7.7%, compounded monthly. Who would save more by paying off his loan 13 years early?

Answer: Dan Would save more Since he has $15,000 more in principal.

Answers

Answer: he would save15,000

Step-by-step explanation:

Select no real solution, one real solution, or infinitely many real solutions for each of the following equations.
No Real Solution One Real Solution Infinitely Many Real Solutions
√x – 13=-4
2√x+10=8
2/x-1= 3/x+2

Answers

Answer:

one real solution

no real solution

one real solution

Step-by-step explanation:

I need help, please please please

Answers

Answer:

A.

Step-by-step explanation:

There is a picture of a graph

The answer is A for your answer

S
What is the solution to this system of equations?
3x + y = 2
2 + 3y
-
--18
re
O (2,-6)
ware
O (3,-7)
(-6, 2)
aphing
O (-7,3)

Answers

Answer:

-7,3

Step-by-step explanation:

look at the pictire

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