Question

Can someone help me with this ASAP!

Answer 1

So the equation for the volume of the sphere is $V= \frac{4}{3} \pi r^3$ .

For this, you'll need to plug in 128 pi into the volume placeholder and solve for r.

$128 \pi = \frac{4}{3} \pi r^3$

Firstly, divide by pi on each side of the equation to cancel out pi. Your equation will look like this: $128=\frac{4}{3}r^3$

Next, you'll want to multiply 3/4 on each side to cancel out 4/3. Your equation will look like this: $96=r^3$

Lastly, you'll want to 3rd root each side of the equation, and your answer should be $4.58=r$ . The correct option is B. 4.58