For this problem we know that the initial fee is 15 and the daily rate is 22.. We also know that the total amount available is 147 and we are trying to estimate how many days does the plan to boas his dog.
Let's define some notation with x representing the number of days desired. And from the info given we can create the following equation:
Now we just need to solve for x we can subtract in both sides 15:
And dividing by 22 both sides:
And then the final answer for this case would be:
B. 6 days