Does anyone use Insta?

Afarm that has 4 x 10^2 acres has 1.2 x 10^5 cattle. what is the average number of cattle per acre? write the answer in scientific notation. answere asap

Let f(x) = 5/x and g(x)=2x2+5x. what two numbers are not in the domain of f o g

Type the correct answer in the box. use numerals instead of words. if necessary, use / for the fraction bar.