The planet mars could be a future destination for the u. s. space program. assume that mars is a perfect sphere. its surface area is about 145 million square kilometers. what is the radius of mars at its equator? round to the hundreds place.
||| answer choices:
a) 4,500 km
b) 2,200 km
c) 5,000 km
d) 3,400 km |||

Surface area of a sphere is  4 times pi timers radius^2
aprox pi=3.14

so surface area=145,000,000

145,000,000=4 times 3.14 times rdaius^2
145,000,000=12.56 times radius^2
divide both sdies by 12.56
11544585.987=r^2
square root both sides
3397.73=radius

round to the hundreds
3397 rounded to the hundreds
3400

the answer is D 3,4000 km

Arhombus is a quadrilateral.