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? A) 1.035 x 109 B) 1.035 x 1010 C) 1.035 x 10-10 D) 1.035 x 1011

Answer 1

D) 1.035*10^11

Hope this helps

Answer 2

The correct option is: D)
`1.035 * 10^1^1`

Step-by-step explanation

Number of mails delivered in the month of December
`=7.14 * 10^1^0`

and number of mails delivered in the month of January
`= 3.21* 10^1^0`

For finding the total number of mails delivered for these two months, we need to add
`7.14 * 10^1^0` and
`3.21* 10^1^0`

`(7.14 * 10^1^0)+(3.21* 10^1^0)\\ \\ = (7.14+3.21)* 10^1^0\\ \\ = 10.35* 10^1^0\\ \\ =(10.35)/(10)* 10^1^1 = 1.035 * 10^1^1`

So, the total mail delivered for these two months is
`1.035 * 10^1^1`