The volume of a cube is 1000 cubic inches. What is the edge length of the cube?

We know that the formula for cube volume is a³ and that we're looking for a in this specific case, so we can write it down as a simple equation:

a³ = 1000 / ∛ (both sides)

a = ∛1000

a = 10

Doublecheck:

10³ = 10 * 10 * 10 = 1000, so it's correct; )