Solve the Problem $\mathrm { H }$ (In Meters) After $\mathrm { x }$

Multiple Choice

Solve the problem.
-If a rock falls from a height of 70 meters on Earth, the height $\mathrm { H }$ (in meters) after $\mathrm { x }$ seconds is approximately $\mathrm { H } ( \mathrm { x } ) = 70 - 4.9 \mathrm { x } ^ { 2 }$
When does the rock strike the ground? Round to the nearest hundredth, if necessary.

A) $14.29 \mathrm { sec }$
B) $2.92 \mathrm { sec }$
C) $3.78 \mathrm { sec }$
D) $1.71 \mathrm { sec }$