F(x) = x + 2
g(x) = x-4
(fg)(x) =
A 2x-2
B x^2-8
C x² – 2x- 8
D x^2+ 2x - 8

Suppose a laboratory has a 30 g sample of polonium-210. the half-life of polonium-210 is about 138 days how many half-lives of polonium-210 occur in 1104 days? how much polonium is in the sample 1104 days later? 9; 0.06 g 8; 0.12 g 8; 2,070 g