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Solve the Problem tt Seconds Is h=16t2+640th = - 16 t ^ { 2 } + 640 t

Question 297

Multiple Choice

Solve the problem.
-A projectile is thrown upward so that its distance above the ground after tt seconds is h=16t2+640th = - 16 t ^ { 2 } + 640 t After how many seconds does it reach its maximum height?


A) 10 s10 \mathrm {~s}
B) 30 s30 \mathrm {~s}
C) 40 s40 \mathrm {~s}
D) 20 s20 \mathrm {~s}

Correct Answer:

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