Question

2. 8.EE.1.4 At a given time, Saturn was 9.1 x 108 miles from the Sun and Earth was 9.3 X 107 miles from the Sun. By what distance is one planet closer to the Sun than the other planet? A. 2 x 101 B. 2 x 105 C. 8.17 x 107 D. 8.17 x 108

Answer 1

The planet Saturn from the Sun was:

`9.1*10^8`

The Earth miles from the Sun is:

`9.3*10^7`

The difference between them is:

`\begin{gathered} (9.1*10^8)\text{ -(9.3}*10^7) \\ (91*10^7)\text{ - (9.3}*10^7) \\ \text{Factor out 10}^7,\text{ we get} \\ (91-9.3)10^7 \\ 81.7*10^7 \\ 8.17*10^1*10^7 \\ 8.17*10^(1+7) \\ 8.17*10^8\text{ miles} \end{gathered}`

Thus, the correct answer is option D