The US postal service delivered 7.14 * 10 ^ 10 pieces of mail in the month of December and 3.21 x 10 ^ 10 in the month of January. What is the total mail delivered for these two months?
To find the total mail delivered for December and January, you simply add the two values together:
7.14 * 10^10 + 3.21 * 10^10 = 10.35 * 10^10
= 1.035 * 10^11
Therefore, the total mail delivered for December and January is 1.035 x 10^11 pieces.