What is the volume of the sphere with radius 4?

Question

imstuck · Answer

Do you know the volume formula for a sphere?

anonymous · Answer

options 
a.64pi units^3
b.85.33pi units^3
c.256 pi units^3
d.5.33 pi units^3

anonymous · Answer

the formula is 4/3 pi r^3

kainui · Answer

$$\Large V=\frac{4}{3}\pi r^3$$ This is the volume of a sphere from the radius.

As an extra bonus, if you multiply this by the exponent and subtract one from the exponent you get the surface area of a sphere. $$\Large A= 4 \pi r^2$$ It might be helpful to remember them as a pair.

kainui · Answer

So if you have the formula, just plug in the radius by replacing r with the value.

nurali · Answer

V=4/3πr^3
r=3
Plug the Value

imstuck · Answer

that's right.  You have everything now except the volume itself.  Use the radius they gave you of 4 and cube it.  V = 4/3 pi (4)^3; V = 85.33 pi units cubed

anonymous · Answer

when i do the equation i get 268.0825

anonymous · Answer

@IMStuck

hartnn · Answer

keep pi as pi only.
calculate 4/3 r^3 
and append pi in the end