Question

The distance to Star A is about 8 × 10^4 light years. The distance to Star B is about 2 × 10^6 light years. Choose which star is farther away. Then fill in the blankwith a number written in standard notation.

Answer 1

Given:

$\begin{gathered} \text{The distance of star A is 8}\times10^4\text{ light years} \\ \text{The distance of star B is 2}\times10^{6^{}}\text{ light years} \end{gathered}$

To choose which start is farther away,

$\begin{gathered} \text{Star B -Star A=}(2\times10^6)-(8\times10^4) \\ =10^4(2\times10^2-8) \\ =192\times10^4 \end{gathered}$$\text{Star B is 192}\times10^4\text{ light years times far away from star A.}$