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3 years ago

5

The motion of a ball scooped by a field hockey player can be modeled by h=-16t^2+40t, where t is the time in seconds and h is th

e height of the ball. When will the ball reach 25 feet?
Solve with quadratic formula or completing the square or factoring, thank you!!

1 answer:

tester [92]3 years ago

5 0

25 = -16t^2 + 40t

16t^2 - 40t + 25 = 0

(4t - 5)(4t - 5) = 0

4t - 5 = 0

t = 5/4 = 1.25 seconds.

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