The prime factorizations of 16 and 24 are shown below.
prime factorization of 16: 2, 2, 2, 2
prime factorization of 24: 2, 2, 2, 3
using the prime factorizations, what is the greatest common factor of 16 and 24?
a.2
b.2'2
c.2'2'2
d.2'2'2'2'3

256π units²   (answer b)

step-by-step explanation:

the formula for the surface area of a sphere of radius r

is             a = 4πr²

and so, if r = 8 units, then the surface area is:

a = 4π(8 units)² = 256π units²   (answer b)

452,489 to the nearest thousand is 452,000