Elana has a square piece of wood with an area of 69 square inches. How long should each side be by rounding to the nearest 10th of an inch?

Can someone answer these problems for me

Solve the equation w^3 = 1,000 i honestly dont know how to punch this into a calculator pls

The diameter of the moon is about 3500 km. approximate the surface area of the moon using the formula for the surface area of a sphere, s = 4? r^2. write your answer in scientific notation.