SOLUTION: At the start of the basketball game, the referee tosses a ball for a jump ball. The equation that models the height of the ball is h(t) = -16t2 + 24t + 5 During what time interv

Question 619125: At the start of the basketball game, the referee tosses a ball for a jump ball. The equation that models the height of the ball is
h(t) = -16t2 + 24t + 5
During what time interval is the height of the ball above 9 feet? (Round your answer to the nearest tenth of a second.)
a) .5 seconds to 2.1 seconds
b) .4 seconds to 1.9 seconds
c) .6 seconds to 1.8 seconds
d) .2 seconds to 1.3 seconds
Answer by josmiceli(19441) (Show Source): You can put this solution on YOUR website!
It reaches 9 ft going up and coming back down

Use the quadratic formula

I think the answer is (d)
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