Final answer:
To determine the cost per ounce of raisins Jackson bought, divide the total cost by the quantity. Jackson paid $0.80 per ounce for the raisins, calculated by dividing $4 by 5 ounces.
Step-by-step explanation:
Jackson bought 5 ounces of raisins for $4. To find out how much he paid per ounce, you divide the total cost by the number of ounces. So, you perform the following calculation:
Cost per ounce = Total cost / Number of ounces
Cost per ounce = $4 / 5 ounces
Cost per ounce = $0.80
Therefore, Jackson paid $0.80 per ounce for the raisins.