Solve the Problem $S$ (In Feet) That It Falls In $t$ Seconds Is Given by the Formula

Solve the problem.
-A ball is dropped from a cliff that is 256 feet high. The distance $S$ (in feet) that it falls in $t$ seconds is given by the formula $S = 16 t ^ { 2 }$ . How many seconds (to tenths) will it take for the ball to hit the ground?

A) $4 \mathrm { sec }$
B) $4096 \mathrm { sec }$
C) $16 \mathrm { sec }$
D) $15.5 \mathrm { sec }$

Correct Answer:

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