Tìm một chữ số tận cùng của 2^20

Find and simplify an expression for the area of five rows of x squares with side lengths of x centimeters.

You are at a restaurant and owe $38 for your meal. you want to leave a 20% tip. how much will your tip be?

The first floor of marcus’ house is 1,440 square feet. he will cover 1,033 square feet with wood and the rest with tile. a box of tiles will cover 11 square feet. how many boxes of tile does marcus need to buy to cover the floor?