document.write( "Question 162978: vi. A function gives the value of C as 2 × (22/7) × r. Find C when r = 21 cm and r = 84 cm. \n" ); document.write( "
Algebra.Com's Answer #120102 by jim_thompson5910(35256)\"\" \"About 
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I'll do the first part to get you started\r
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\n" ); document.write( "\n" ); document.write( "\"C=2%2A%2822%2F7%29%2Ar\" Start with the given function\r
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\n" ); document.write( "\n" ); document.write( "\"C=2%2A%2822%2F7%29%2A%2821%29\" Plug in \"r=21\"\r
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\n" ); document.write( "\n" ); document.write( "\"C=924%2F7\" Multiply\r
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\n" ); document.write( "\n" ); document.write( "\"C=132\" Reduce\r
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