For the years 0 through 24 the profit is either zero or a positive number, so the shop is not in debt for those years.
Answer: A. [0, 24]
Without a financial plan, you can end up having a lot of debt. You also may not think about saving money for future expenses or how much you may need. Financial plans are very important for your future.
Let r be a radius of a given circle and α be an angle, that corresponds to a sector.
The circle area is

and denote the sector area as

.
Then

(the ratio between area is the same as the ratio between coresponding angles).

.
11. 9/20
12. 13/20
13. 12/20
that's if it doesn't have to be in percentage form