Final answer:
To find out the cost for 7.5 lbs of walnuts, first calculate the price per pound by dividing $3.45 by 14. Then, multiply that price by 7.5 to get the total cost, which is approximately $1.85 for 7.5 lbs.
Step-by-step explanation:
To calculate the cost of 7.5 lbs of walnuts, we first determine the cost per pound by dividing the total cost for 14 lbs by 14. The price per pound is $3.45 / 14 lb = $0.2464 per lb. Next, we multiply the price per pound by the number of pounds we want to buy, which is 7.5 lbs. So, the cost for 7.5 lbs of walnuts is $0.2464 per lb * 7.5 lbs = $1.848. Therefore, it would cost approximately $1.85 to purchase 7.5 lbs of walnuts.