okay let's me easter you're times!!!
For a non-resident:

For a resident:

We want to know the number of days
such that the two costs are equal ie 
To do this set the two costs equal to each other:


And solve for d:




The costs will be equal when a resident and a non-resident each use the beach for 12 days.
Answer:
x^10
Step-by-step explanation:
x^10
0.4,1.04,1\2,2\3 that is the way to to shortest to the longest