You live in a big house. the master bathroom is 12 by 20 feet. calculate the area of your bathroom. a. 100 sq. ft c. 180 sq. ft b. 240 sq. ft d. 170 sq. ft

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! )