Question

Help 30 minutes to turn in

Answer 1

First, you are going to want to get the terms to the same power of 10 in scientific notation. Realize that
`9.3 \cdot 10^7 = 9.3 \cdot 10^6 \cdot 10^1= 93 \cdot 10^6`. Essentially, we have converted the
`9.3 \cdot 10^7` to a term with
`10^6`. Now, we can subtract the values in each term that are not 10 as shown below:

`93 \cdot 10^6 - 3.14 \cdot 10^6`

`(93 - 3.14) \cdot 10^6`

`89.86 \cdot 10^6`

Remember that we have to turn it back to scientific notation once we are done!

`89.86 \cdot 10^6 = 8.986 \cdot 10^7`

Our answer is the second choice,
`8.98 \cdot 10^7`. (This is the closest answer to
`8.986 \cdot 10^7`.)