A hemisphere has a radius of 8 inches. Which methods will result in the surface area of the entire hemisphere?

halving the surface area of the related sphere
adding half the surface area of the related sphere and the area of the circular region
halving the radius, then determining the surface area of the related sphere
using the formula S = 3πr^2
using the formula S = 3πd^2

According to the 2008 u.s. census, california had a population of approximately 4 × 10^7 people and florida had a population of approximately 2 × 10^7 people. which of the following is true? a. the population of california was approximately two times the population of florida. b. the population of florida was approximately twenty times the population of california. c. the population of florida was approximately two times the population of california. d. the population of california was approximately twenty times the population of florida.