Question 994201
 Use the position function 
s(t) = -16t^2 + v_0t + s_0 
v0 = initial velocity, 
s0 = initial position, 
t = time 
to answer the following question. 
You throw a ball straight up from a rooftop 170 feet high with an initial velocity of 32 feet per second. During which time period will the ball's height exceed that of the rooftop?
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-16t^2 + 32t + 170 > 170
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-16t^2 + 32t > 0
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-16t(t-2) > 0
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ANSWER: Between 0 and 2 seconds. 
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Cheers,
Stan H.
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