Divide f(x) by d(x), f (x)= x^4+2x^3-8x^2-20x+30, d (x)=x^2+2x-3

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