What is the greatest common factor of 15abc^2 and 25a^3bc?

Li buys supplies so he can make and sell key chains. he begins to make a profit only after he sells 4 key chains. what point on the graph makes the most sense in this situation?

What is the ratio for the surface areas of the cones shown below, given that they are similar and that the ratio of their radil and altitudes is 4: 3? 23

Adam used 1072.4 gallons of water over the course of 7 days. how much water did adam use, on average, each day?