Find (fog)(x) and (gof)(x) amd the domain of each f (x)=x^2-2, g (x)=2x-2

Iam at home. /: i am playing video games. translate the following statement into symbolic form.

What fraction is equivalent to 0.46464646··· a. 46⁄99 b. 46⁄999 c. 46⁄100 d. 23⁄50

I'm at a bookstore with $\$35$ in my pocket and a $20\%$-off coupon. what is the cost of the most expensive book i can buy with my money and the coupon? (assume that there are books of every possible price in the bookstore. it's a large bookstore! )