So we wan't to know the value of 4^3. Lets see what that means. When we have a^n it means we multiply a by itself n times like so: a^1=a, a^2=aa, a^3=aaa, a^4=aaaa. So in our case we have 4^1=4, 4^2=44=16 and 4^3=44*4=64. So the correct answer is b. 64
