S=4(pi)(radius)^2

Question

Earth has a radius of about 6.4x10^6 m. What is the approximate surface area of the Earth? Use the Formula S=4(pi)r^2

Answer 1

your formula for surface area of a sphere is correct.

now just plug in the number for r, on your calculator, and use the value 3.1416 for pi, approximately, and do the calculation.