Per hour charge of the kayak = $ 8.50
Rent deposit for kayak = $ 25
Let the number of hours the kayak has been used/rented be represented by = h
Let the rent be represented by = r
Let the total cost be represented by = c
So linear equation becomes:
[tex]c=r+8.50h[/tex]
Now, Sally rented the kayak from 11.30 am to 2.39 pm. This is 3 hours and 9 minutes.
We will convert 9 minutes in hours.
1 minute = [tex]\frac{1}{60}[/tex] hours
9 minutes = [tex]\frac{9}{60}=0.15[/tex] hours
So total hours become = 3+0.15 = 3.15 hours
So, according to the linear equation, the cost becomes:
[tex]c=25+8.50(3.15)[/tex]
=[tex]25+26.775[/tex] =51.775 or rounding to 2 digits we get 51.78
Hence, the total cost to rent the kayak is $51.78