Answer:
OPTION B
Explanation:
The total cost for borrowing a book for c days, where c is greater than 10, can be calculated as follows:
For the first 5 days, the cost is a cents per day. So the cost for the first 5 days is 5a cents.
For the remaining days (c - 5), the cost is b cents per day. So the cost for the remaining days is b(c - 5) cents.
Therefore, the total cost for borrowing a book for c days is the sum of the cost for the first 5 days and the cost for the remaining days:
Total cost = 5a + b(c - 5) = 5a + bc - 5b
Option B, a + b(c - 5), is the correct answer.
The total cost for borrowing a book for c days is a + b(c - 5).The correct answer is option B.
To calculate the total cost for borrowing a book for c days, where c is greater than 10, we need to consider two scenarios: the first 5 days and the remaining days after that.
For the first 5 days, the library charges a cents per day. So, the cost for the first 5 days is 5a.
For the remaining days (c - 5), the library charges b cents per day. So, the cost for the remaining days is (c - 5) * b.
To find the total cost, we sum up the costs for the first 5 days and the remaining days:
Total cost = 5a + (c - 5) * b.
Simplifying this expression, we get:
Total cost = 5a + bc - 5b.
Rearranging the terms, we can write it as:
Total cost = a + bc - 5b.
Therefore, the correct option is B. a + b(c - 5).
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