What is 20/10 as a mixed number?

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

The lengths of all sides of a triangle are integers when measured in decimeters. one of the sides has length of 1 dm and another of 3 dm. find the perimeter of the triangle.'

Use multiples to write two fractions equivalent to 7/9. 14/18, 8/10 6/8, 21/27 10/12, 28/36 14/18, 21/27