Which statements about g are true
g(x)=x
A. g(-5.7)=-5
B. g(-2.3)=-2
C. g(-0.6)=-1
D g(4.1)=5
E g(7.5)=7

multiple choice question plz help

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