I believe b and c don’t have a solution
I think the answer is par
Answer:

Step-by-step explanation:
Let P% of the transaction amount is charged in the account.
So, if the transaction amount is x, then the charge for that transaction will be
.
Therefore, if f(x) represents the amount Isabel is charged for the transaction then we can write
, where P% is the rate of charge. ( Answer )
Answer:
the third one i just took the test
Step-by-step explanation:
The difference would be 37