Answer:
A
Step-by-step explanation:
We have to multiply it by two because they have us 2 numbers for the legs, we use the Pythagorean theorem thing, but we have to basically add them, or we can multiply y 2(since they are the same number). Anyways 
Straight line
Explaintion .
Ratios don't have to be "per" something, while rates are "per" something.
Ratios compare 2 or more values, as well as rates.
X^2 * 5,x^4 so B is the answer
Hundredth: 142
Hundred: 100
Ten: 140
Tenth: 142<span />