Ametal worker has a metal alloy that is 30% copper and other alloy that is 60% copper. how many kilograms of each alloy should the metalworker combined to create 60 kilograms of 51% copper alloy

Henry is an avid reader, he devours 90 pages in half an hour how many pages has henry read per minute?

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?

The two square pyramids are similar. find the total volume of both pyramids if the ratio of their surface areas is 9/16