What can you add to get 18 but multiply to get 180

17 in long 1.3 ft wide and 8in high what is the volume

True or false look at the picture pls : /

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! )