rosieanneanney

31.07.2019 • 

Mathematics

Quickly for 5 stars and 1. omar set off a rocket in a field. the height h of the rocket in feet can be roughly estimated using the formula h = -16t^2 + 128t, where t is the time in seconds. how long will it take the rocket to reach a height of 240 feet? 2. josefina tosses a ball upward with an initial velocity of 76 feet per second. she tosses it from an initial height of 2 feet. find the approximate time that the ball hits the ground. use the function h(t) = -16t^2 + 76t + 2 round to the nearest second. 3. brandi, an amateur skier, begins on the "bunny hill," which has a vertical drop of 200 feet. her speed at the bottom of the hill is given by the equation v^2 = 64h, where the velocity v is in feet per second and the height h of the hill is in feet. assuming there is no friction, approximate brandi's velocity at the bottom of the hill.

Ответ:

cici65360

15.03.2022

Mathematics

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1.
Height h = 240 feet
We insert it into formula.

Now we solve this for t:


We have two answers as the rocket will pass this height on it's way up and down.

2.
Height h = 0 feet
We insert it into formula.

Now we solve this for t:

We do not consider solution -1 as the time can not be negative. Our solution is 5s.

3.
Height at bottom of hill h = 0 feet
We insert it into formula.

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Ответ:

booney46

06.02.2020

Mathematics

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The average rate of change over the given time interval is the difference quotient , so for this value to be zero, it must be the case that , i.e. the same number of tickets were sold on the 4th day as on the 10th day.

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