Final answer:
To calculate how many feet of chain can be bought with $18 at a cost of $1.50 per foot, divide the total amount by the cost per foot, resulting in the ability to purchase 12 feet of chain.
Step-by-step explanation:
The question involves a basic division calculation to determine how many feet of chain can be bought with $18, when the chain costs $1.50 per foot. To find the answer, divide the total amount of money available ($18) by the cost per foot of chain ($1.50). This calculation is as follows:
Number of feet = Total money / Cost per foot = $18 / $1.50 per foot = 12 feet
Therefore, you can buy 12 feet of chain for $18, which means the correct answer is D) 12 feet.