Answer
a) $1.4519 * 10^8 km^2$
b) $145190000 km^2$
Work Step by Step
a)
$SA = (3.4* 10^3)^{2}*4\pi$
$SA = 3.4^2 * (10^3)^{2} * 4\pi$
$SA = 46.24\pi *10^6$
$SA = 145.1936 * 10^6$
$SA = 1.4519 * 10^8$
b)
$SA = 1.4519 * 10^8$
$SA = 1.4519 * 100,000,000$
$SA = 145,190,000$
