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Solve the Problem $t$ Seconds Is $h = - 14 t ^ { 2 } + 560 \mathrm { t }$

Question 58

Multiple Choice

Solve the problem.
-A projectile is thrown upward so that its distance above the ground after $t$ seconds is $h = - 14 t ^ { 2 } + 560 \mathrm { t }$ . After how many seconds does it reach its maximum height?

A) $28 \mathrm { sec }$
B) $40 \mathrm { sec }$
C) $14 \mathrm { sec }$
D) $20 \mathrm { sec }$

Solve the Problem ttt Seconds Is h=−14t2+560th = - 14 t ^ { 2 } + 560 \mathrm { t }h=−14t2+560t

Multiple Choice

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Solve the Problem $t$ Seconds Is $h = - 14 t ^ { 2 } + 560 \mathrm { t }$

Correct Answer:
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