Set of points that is the union of two rays having the same endpoint is

Diana is painting statues she has 7/8 of a liter of paint each statue requires 1/20 of a liter of paint how many statues can she paint?

You are at a restaurant and owe $56.20 for your meal. you want to leave an 18% tip. approximately how much is your tip?

How long must $542 be invested at a rate of 7% to earn $303.52 in interest? in a easier way