Solve for B.
b(to the 3rd power) = 1,331
b^3 = 1331
b = 11
This problem is asking for the cube root of 1331. ( b * b * b = 1331 ?)
There is really nothing to solve.
Just like the square root of 100.
You either know the answer off hand,
approximate to get the answer, use trial an error, OR use a calculator.