## Algebra 1: Common Core (15th Edition)

$SA_{Mars}$=1.45 $\times$ $10^{8}$ square kilometers.
Use the equation from the problem and the radius: $SA_{mars}$=4$\pi$(3.4$\times$$10^{3}$$)^{2}$. $SA^{mars}$=115.26 $\times$ $10^{6}$ -distribute the power 2 to the terms inside the parentheses- $SA_{Mars}$=1.45 $\times$ $10^{8}$