document.write( "Question 261344: What is the radius of a tennis ball with a surface area of 28 in.²?
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Algebra.Com's Answer #192529 by Edwin McCravy(20056) $\"\"$ $\"About$

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What is the radius of a tennis ball with a surface area of 28 in.²?
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document.write( "A tennis ball is a sphere.  The formula for the surface area of a sphere is\r\n" );
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document.write( "We substitute 28 for A and solve for r\r\n" );
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document.write( "Divide both sides by \r\n" );
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document.write( "Take the square root of both sides:\r\n" );
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document.write( "Punch that out on a calculator and you\r\n" );
document.write( "get 1.49270533 inches, which rounds to \r\n" );
document.write( "1.5 inches, choice A.\r\n" );
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document.write( "Edwin

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