SOLUTION: 1. A triangular window of height 15 inches and base 21 inches is to be laminated with a sunblock coating that costs $1.22 per square inch to apply. What is the total cost of coatin

Algebra ->  Human-and-algebraic-language -> SOLUTION: 1. A triangular window of height 15 inches and base 21 inches is to be laminated with a sunblock coating that costs $1.22 per square inch to apply. What is the total cost of coatin      Log On


   

Question 170232: 1. A triangular window of height 15 inches and base 21 inches is to be laminated with a sunblock coating that costs $1.22 per square inch to apply. What is the total cost of coating the window, to the nearest cent? (Hint: Area of Triangle: A = base*height/2)
Found 2 solutions by nerdybill, checkley77:
Answer by nerdybill(7384) About Me  (Show Source):
You can put this solution on YOUR website!

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

Answer by checkley77(12844) About Me  (Show Source):
You can put this solution on YOUR website!
a=15*21/2
a=315/2
a=157.5 in^2
1.22*157.2=$192.15 is the cost to coat the window.