find the surface area of the sphere to the nearest square unit. use a calculator.
a. 254 in.2
b. 64 in.2
c. 127 in.2
d. 1,018 in.2
t = 1/400 h ⇔ 0.0025 h ⇔ 9s ⇔ 0.15 m
any of the answers are correct.