An architect built a model of a 220-foot tall building he is designing. the model is 25 inches tall and 10 inches wide. how wide is the actual building?

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! )