Solve the Problem $63.7 \mathrm{~m}$ High as It Is Falling, Its Height Is Given by

Multiple Choice

Solve the problem. Round to the nearest tenth, if necessary.
-A rock falls from a tower that is $63.7 \mathrm{~m}$ high. As it is falling, its height is given by the formula $\mathrm{h}=63.7-4.9 \mathrm{t}^{2}$ . How many seconds will it take for the rock to hit the ground $(\mathrm{h}=0)$ ?

A) $8 \mathrm{sec}$
B) $7.7 \mathrm{sec}$
C) $3.6 \mathrm{sec}$
D) $828.1 \mathrm{sec}$