Final answer:
Mickey will pay $10.35 for three boxes of baseballs by first calculating the price per box ($3.45) by dividing the total cost of eight boxes ($27.60) by the number of boxes, and then multiplying the price per box by three.
Step-by-step explanation:
To find out how much Mickey will pay for three boxes of baseballs, we first need to determine the cost per box. Since eight boxes cost $27.60, we can find the price per box by dividing the total cost by the number of boxes.
The price per box is:
$27.60 ÷ 8 = $3.45 per box
Now, to find the cost for three boxes:
$3.45 per box × 3 boxes = $10.35
Therefore, Mickey will pay $10.35 to buy three boxes of baseballs.