Sofia and ella are both writing expressions to calculate the surface area of a rectangular prism however they wrote different expressions.

a. examine the expressions below, and determine if they represent the same value. explain why or why not.
sofia's expression
(3 cm x 4 cm ) + (3 cm x 5 cm) + (4 cm x 5 cm) + (4 cm x 5 cm)
ella's expression:
2(3 cm x 4 cm) + 2(3 cm x 5 cm) + 2(4 cm x 5 cm)

b. what fact about the surface area of a rectangular prism does ella's expression show more clearly than sofia's?