Myung

You are wallpapering two walls of a room. One wall measures 15 ft by 12 ft and the other measures 9 ft by 12 ft. The wall paper costs $19.40 per roll, and each roll covers 50 square feet. What does it cost to cover the two walls?

A tire has a diameter of 30 cm. How far does it travel in 5 revolutions? Use 3.14 for π(pi).

Find the area (in square centimeters) of a triangular piece of cloth with a 14-centimeter base and an 18-centimeter height.