SOLUTION: the height h in feet of a ball t seconds after being tossed upwards is given by the function h(t)=84t-16tē a. After hown many seconds will hit the ground? b. What is its maxi

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Question 647609: the height h in feet of a ball t seconds after being tossed upwards is given by the function h(t)=84t-16tē
a. After hown many seconds will hit the ground?
b. What is its maximum height?
Answer by josmiceli(19441)   (Show Source): You can put this solution on YOUR website!

(a)
It hits the ground when
There are 2 times when
The first is at when the ball
is thrown upwards.
The second is when the ball actually hits the ground



The ways to make the equation true is
(1) Make ( when ball is thrown upward )
(2) Make


sec
---------------
(b)
With a parabola ( which it is ) the max or min
occurs midway between the 2 solutions, so
it is at:
sec
Now find


ft
Here's the plot:
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