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8 votes
8 votes
Paula kicks a ball off the ground into the air. The height, in feet, of the ball t seconds after it is kicked is modeled by the function h(t) = -16t2 +80t. How long after the kick will it take for the ball to reach its maximum height?

User Daniel Mora
by
2.2k points

1 Answer

26 votes
26 votes

Answer:

2.5s

Explanation:

At maximum height, dy/dx=0

dy/dx=-32t+80=0

32t=80

t=80/32

t=2.5s

User Ramsay Smith
by
2.9k points
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