Mathematics, 08.12.2021 23:50, winterblanco

If a toy rocket is launched vertically upward from ground level with an initial velocity of 135 feet per second, then its height h after t seconds is given by the equation h(t) = -16t2 + 135t. How long will it take the rocket to return to the ground? A-4.2 seconds
B-135 seconds
C-16 seconds
D-8.4 seconds

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If a toy rocket is launched vertically upward from ground level with an initial velocity of 135 feet...