Raj builds a side table in the shape of a cube. each edge of the cube measures 30 inches. raj wants to cover the top and four sides of the table with ceramic tiles. each tile has an edge length of 3 inches. how many tiles will he need?

The swimming pool is open when the high temperature is higher than 20∘c. lainey tried to swim on monday and thursday (which was 3 days later). the pool was open on monday, but it was closed on thursday. the high temperature was 30∘c on monday, but decreased at a constant rate in the next 3 days. write an inequality to determine the rate of temperature decrease in degrees celsius per day, d, from monday to thursday.