Answer:
A. Equation is

B. Cost is $88
Explanation:
A)
Suppose you rent for x hours and each hour costs $15.75
How much would you need to pay?

Moreover, there is a $25 dollar (fixed) deposit for renting, so that gets added to your payment. All in all, you have to pay

This is the equation of renting a snowboard for x hours.
Equation is

- Where x is the number of hours you rent the snowboard, and
- c is the total cost
B)
If you are renting from 8.30 to 12.30, you are basically renting for 4 hours.
To know how much it will cost, you simply plug in 4 into x (in the equation):

Cost is $88