Answer:
$36
Explanation:
If the board is 9ft by 9ft, that means all for edges are 9 ft long. Therefore, multiply 9 by 4 to the total perimeter.
9x4=36ft
If the ribbon is $1 per foot, multiply the perimeter by the cost per foot.
36 ft x $1/ft = $36
$36 for 36 sq ft
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