What is the reciprocal of 3 by 8 to the power of 4 plsss answer fasttt​

Don't know how to find x given these segment lengths

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?

You earn a 12% commission for every car you sell. how much is your commission if you sell a $23,000 car?