The Graph Of A Quadratic Function (Day 1) Examples And Worksheet - Algebra Unit 11-Graphing Quadratics Page 15
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152.
A rocket carrying fireworks is launched from a hill 80 feet above a lake. The rocket will
fall into the lake after exploding at its maximum height. The rocket’s height above the
surface of the lake is given by the function h(t) = -16t
+ 64t + 80.
2
a.
What is the height of the rocket after 1.5 seconds?
b.
What is the maximum height reached by the rocket?
c.
After how many seconds after it is launched will the rocket hit the lake?
3.
A rock is thrown from the top of a tall building. The distance, in feet, between the rock
and the ground t seconds after it is thrown is given by d(t) = -16t
– 4t + 382. How long
2
after the rock is thrown is it 370 feet from the ground?
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