A person rolls 2 dice, one after the other. P(even sum) or P(sum of 9)

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! )

Aparking garage charges $1.12 for the first hour and 0.50 for each additional hour. what is the maximum length of time tom can park in the garage if we wishes to play no more than $5.62

Me i'm timed right now! a. (0,-5)b. (0,-3)c. (0,3) d. (0,5)