The distance (in feet)that an object will fall in t seconds is given by the formula $s = 16 t ^ { 2 }$ . How long will it take an object to fall 784 feet?
A)7 sec
B)49 sec
C)9 sec
D)6 sec
E)48 sec

Question

Quizplus · Accepted Answer

Given the formula $s = 16t^2$ and $s = 784$, we solve for $t$ by substituting $s$ with $784$: $784 = 16t^2$. Dividing both sides by 16 gives $t^2 = 49$, and taking the square root of both sides gives $t = 7$.

The Distance (In Feet)that an Object Will Fall in T s=16t2s = 16 t ^ { 2 }s=16t2

The Distance (In Feet)that an Object Will Fall in T $s = 16 t ^ { 2 }$