Question

The US postal service delivered 7.14 x 1010 pieces of mail in the month of December and 3.21 x 1010 in the month of January. What is the total mail delivered for these two months?

Answer 1

I assume that the numbers are supposed to be written as 7.14 x 10^10 for December and 3.21 x 10^10. The total mail delivered is the sum of these two numbers.
                         (7.14 x 10^10) + (3.21 x 10^10) = 1.035 x 10^11

Answer 2

answer is really  3.008 x 1020 took the test im late to answer by years