Sam, Max, and Edith completed the problems below.

Question

Sam: 7^3∙7^5=7^8
Max: 7^3∙7^5=7^15
Edith: 7^3∙7^5=49^8

Who completed the problem correctly?
What did the other two students do wrong in their answers?

Answer 1

Edith completed the problem correctly.

In Sam's answer, he added the exponents instead of multiplying them. The correct answer should be 7^8, not 7^8+3.

In Max's answer, he added the exponents instead of multiplying them. The correct answer should be 7^15, not 7^3+5.