Arectangular billboard is 7 2/3 long and 4 yards wide what is the area of the billboard

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. determine an equation to model his situation?

If 25% of y is 30, what is 60% of y?

How to find the exponential function y=ca^x, with points (1,2) and (2,1)