Solve the problem.
-If a rock falls from a height of 100 meters above the ground, the height $\mathrm { H }$ (in meters) after $\mathrm { x }$ seconds can be approximated using the formula $\mathrm { H } = 100 - 4.9 \mathrm { x } ^ { 2 }$. What is the height of the rock after 2 seconds?
A) $3.96 \mathrm {~m}$
B) $80.4 \mathrm {~m}$
C) $90.2 \mathrm {~m}$
D) $380.4 \mathrm {~m}$

Question

Quizplus · Accepted Answer

To find the height of the rock after 2 seconds, substitute $x = 2$ into the formula: $H = 100 - 4.9(2)^2 = 100 - 4.9(4) = 100 - 19.6 = 80.4$ meters.

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

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