document.write( "Question 812701: A round piece of plate steel is 58 in. in diameter and has 35 - 1.5 in holes punched in it. How many in2 of material are left in the plate? Round your answer to two decimal places. \n" ); document.write( "
Algebra.Com's Answer #489255 by mananth(16946)\"\" \"About 
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Area of circular steel plate = pi * r^2\r
\n" ); document.write( "\n" ); document.write( "r=29 in\r
\n" ); document.write( "\n" ); document.write( "A= pi* 29^2
\n" ); document.write( "=2640.74 in^2\r
\n" ); document.write( "\n" ); document.write( "area of hole\r
\n" ); document.write( "\n" ); document.write( "r= 0.75
\n" ); document.write( "area = 3.14*0.75^2
\n" ); document.write( "=1.77 in^2\r
\n" ); document.write( "\n" ); document.write( "no of holes = 35
\n" ); document.write( "total area of holes = 35*1.77
\n" ); document.write( "=61.82 in^2\r
\n" ); document.write( "\n" ); document.write( "=2640.74-61.82\r
\n" ); document.write( "\n" ); document.write( "2578.90 in^2 balance
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