Answer:
d = x + 90
Step-by-step explanation:
Total dollars to be paid by Mr. Sykes = Rent for the boat for 3 hours + cost of damage
= 90 + x
360/18=20
So, your answer is 20 unit rate.
Hope this will help you!
Usually when you add big numbers together, you get a result of exponents involved :) answer for your question : 1.212154551 e^22