document.write( "Question 170270: 4. 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? \n" ); document.write( "

Algebra.Com's Answer #125814 by Mathtut(3670) $\"\"$ $\"About$

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Total square inches of the area would be
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\n" ); document.write( "7 (5.5)=38.5 sq in
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\n" ); document.write( "but we must subtract out the middle portion of 1.2 inches by .3 inches in order to get the light switch area.
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\n" ); document.write( "1.2 (3)=3.6 sq in
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\n" ); document.write( "38.5-3.6=34.9 sq in. at a cost of $4.27 a sq in would be
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\n" ); document.write( "34.9 (4.27)=$ 149.02 \n" ); document.write( "

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