Question 765810
She wants the pen to be 30 inches long and 45 inches wide.  So we want to calculate the Perimeter (P) of the pen.
P = 2*length + 2*width
P = 2*30 + 2*45
P = 60 + 90 = 150 inches
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we want our answer to be in feet so we divide 150 by 12 = 12.5 feet
so we need the 15 foot piece of wood