Question

find the unit place of ?
1) 2^501 - 2^80
2)2^71 + 2^35 -3^20

Answer 1

Okay, so first off we are referring to this is a proportion, but it can also be considered a ratio. The question we are really asking here is whether 71/2 equals 38/29 in a different proportion. Let's look at it visually and use letters to explain how proportions work: