Gerome works as a waiter. He earns 80$ each week and 15% in tips on meals served. This weekend Gerome earned 252.50$ in all. What was the dollar amount of the meals gerome served

Element x decays radioactively with a half life of 8 minutes. if there are 450 grams of element x, how long, to the nearest tenth of a minute, would it take the element to decay to 37 grams?

After t seconds, a ball tossed in the air from the ground level reaches a height of h feet given by the equation h = 144t-16t^2. after how many seconds will the ball hit the ground before rebounding?

Write as a product: ac^2–ad+c^3–cd–bc^2+bd