How many distinguishable ways can you arrange the letters in aaabb?

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

Ineed if you could explain and give me the answer you! this needs done

Tabby sells clothing at a retail store, and she earns a commission of 6.25% on all items she sells. last week she sold a pair of jeans for $32.50, a skirt for $18.95, and 2 blouses for $14.95 each. what was tabby's total commission? a $4.15 b $5.08 c $81.35 d $348.60