What does the 2 on top of a number mean

The two on the top of a number stands for exponent, which simply means you multiply the number by itself once

exponents

Step-by-step explanation:

The two on top of a number means exponent. It is also commonly referred to as number squared, It refers to multiplication of the number by itself.

For example, 2 on top of 4 is called 4 squared and it means 4 × 4 = 16.

I hope this is clear.

answer: a

step-by-step explanation:

if xy ~ yz therefore xy would be the same length as yz

answer: a.   one is a factor of every whole number since every number is divisible by itself.