document.write( "Question 541422: a hollow tennis balls has radius of 4.2cm the tennis ball skin is 0.3cm think how much air is contained inside the tennis ball? \n" ); document.write( "
Algebra.Com's Answer #354180 by Alan3354(69443)\"\" \"About 
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a hollow tennis balls has radius of 4.2cm the tennis ball skin is 0.3cm think how much air is contained inside the tennis ball?
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\n" ); document.write( "The ID of the ball is 4.2 - 0.3 = 3.9 cm
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\n" ); document.write( "\"Vol+=+4%2Api%2Ar%5E3%2F3\" cc
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