<PRE><B>Question 725486</B>
Mr. Whitney tosses a softball directly upward with an initial velocity of 100 feet per second. Use the formula h(t) = -16t^2 + vt to answer each question.
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a. When the ball reach a height a height of 84 feet?
Solve -16t^2 + 100t - 84 = 0
Ans: x = 1 second and x = 5.25 seconds
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b. When will the ball hit the ground?
Solve -16t^2 + 100t = 9
t(-16t+100) = 0
t = 100/16 = 6.25 seconds
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Cheers,
Stan H.

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