Need help with this math problem

Players on the school soccer team are selling candles to raise money for an upcoming trip. each player has 24 candles to sell. if a player sells 4 candles a profit of$30 is made. if he sells 12 candles a profit of $70 is made

Wich statement could be used to explain why the function h(x)= x^3 has an inverse relation that is also a function

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