Question 170232

Using the hint provided:
Area of Triangle: A = base*height/2
.
From the problem it gave us:
base = 21
height = 15
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Plugging it into:
A = base*height/2
A = 21*15/2
A = 315/2
A = 157.5 square inches
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Since sunblock costs: $1.22 per square inch
1.22 * 157.5 = $192.15