Answer:
6.5 inch speakers for 17.99 is the better deal.
Step-by-step explanation:
Divide 17.99 by 6.5 to find the cost per inch for the 6.5 inch speakers, which is approx. 2.8 (rounded to the tenth).
Multiply 2.8 by 12 to get $33.60, which is obviously a better deal, as the 6.5 inch speakers are cheaper. Hope this helps.