Duke is buying a new cellphone case that is on sale for 20% off. The sale price is $16 before tax. What was the original price of the cellphone case?

Elizabeth claims that the fourth root of 2 can be expressed as 2^m since (2^m)^n = 2. find the values of m and n for the case where elizabeth's claim is true.

Precalculus question, image attached.

Acircus act has 3 times as many elephants as acrobats. jorge noticed that all together there were 56 legs in the circus ring. how many elephants were in the show?