Lesson 15 Numerical Expressions with Exponents 155 Go back and see what you can check off on the Self Check on page 145. 4 Look at the cube below. 5in. 5in. 5in. Which statement correctly calculates the volume of the cube? Choose True or False for each statement. a. Simplify the expression 5 1 5 1 5. True False b. Simplify the expression 5 3 5 3 5. True False