The answer is C.
The arc length is 6.806784.
Hope this helps.
Total cost of books was 15 + 10 or 25. With the 50 % discount on the $10 book, the total is now $20. The total cost was reduced by (B) 20%.
$5 off the $25 price is a 20% discount.
Answer:
kinda late but the answer is B
Hope this helps!! <3