First Divide: 21.75/ 30
You will get 0.725
Then, multiply 0.725 by 100%
Then your answer should be: 72.5%
Answer:
Step-by-step explanation:
Given
equation of circle 
Equation of tangent passing through (1,1)
Slope of tangent is given by differentiating equation of circle


at 

Equation of line with slope


Answer:
I think the answer is D.
Step-by-step explanation:
Well, if you look at the last few sentences in that picture, it says that "he earns money depending how long he babysits." It's a clue to the answer, so the answer is obviously D.
I am also sorry if my answer is wrong. It might be c but please comment on my answer if you disagree/think it's wrong.