Final answer:
The price per pound of the better deal is $3.50 per pound.
Step-by-step explanation:
To find the price per pound of the better deal, we need to calculate the price per pound for each purchase.
For Finis' purchase:
Price = $10.50
Weight = 3 pounds
Price per pound = $10.50 / 3 = $3.50 per pound
For Marleigh's purchase:
Price = $8.90
Weight = 2.5 pounds
Price per pound = $8.90 / 2.5 = $3.56 per pound
Thus, the price per pound for the better deal is $3.50 per pound.