Answer:
9 cu ft.
Explanation:
That is the sum of the capacities of the 2 boxes
= 3 + 6
= 9 cu ft.
She can fit 9 cubic feet of clothing in the two boxes.
She can fit a total of 3 cubic feet of clothing in one box, and the other she can fit a total 6 cubic feet.
3 + 6 = 9
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