document.write( "Question 327231: An aluminum plate is made according to the following dimensions. The outer radius is 12 inches and the inner radius is 5 inches. Use  = 3.14 as an approximate value. (a) How many square inches in area is the aluminum plate? (b) If the cost to construct the plate is $5.50 per square inch, what is the construction cost? \n" ); document.write( "
Algebra.Com's Answer #234364 by solver91311(24713)\"\" \"About 
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\n" ); document.write( "\n" ); document.write( "Area of the outer circle minus the area of the hole in the middle:\r
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\n" ); document.write( "\n" ); document.write( "You can do your own arithmetic.\r
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