How do you solve this equation ? 5 1 x 10?

What is the value of the expression below? (81^2)^1/8

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

I’m stuck on this equation, anyone got the answer?