you must take from stock 64 lbs of material to make 20 brushes if the order is changed to 25 brushes how much more material will
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In the figure, we can consider that the base is the side that mesures 12 in and that the height is the side that measures 15 in, since that sides are perpendicular. So, we just need to use the given formula:
Hence, the area of the triangle is 90 in² (B).