Which is true about fractions? What does fractions appear as?

Geometry ? i don't know how to do any of these.

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.

Justin has 750 more than eva and eva has 12 less than justin together they have a total of 63 how much money did