SOLUTION: A rectangular light-switch plate is made according to the following dimensions. The length is 7 inches, and the width is 5.5 inches; a rectangular hole measuring 1.2 inches by 0.3

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Question 152044: A rectangular light-switch plate is made according to the following dimensions. The length is 7 inches, and the width is 5.5 inches; a rectangular hole measuring 1.2 inches by 0.3 inches is left in the center. (See diagram below) (a) How many square inches in area is the light-switch plate (the shaded region)? (b) If the cost to construct the plate is $4.27 per square inch, what is the construction cost?
Answer by vleith(2983) About Me  (Show Source):
You can put this solution on YOUR website!
AreaOfRectangle+=+Length%2AWidth
The area of the light swtich is the area of the plate minus the area of the hole
Area+=+AreaPlate+-+AreaHole
Area+=+%287%2A5.5%29+-+%281.2%2A+0.3%29
Area+=+38.5+-+0.36
Area+=+38.14 square inches
At 4.27 per square inch, the toal cost is Cost+=+4.27+%2A+38.14
Cost+=+162.86
That's one expensive light switch.