document.write( "Question 995334: How many integers greater than 1 million and less than 9 million are perfect square?
\n" ); document.write( "A. 1999
\n" ); document.write( "B. 2000
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Algebra.Com's Answer #614087 by jim_thompson5910(35256)\"\" \"About 
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sqrt(1,000,000) = 1,000
\n" ); document.write( "sqrt(9,000,000) = 3,000\r
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\n" ); document.write( "\n" ); document.write( "If you square a whole number between 1,000 and 3,000 (exclusive) you'll get a result that is a whole number between 1 million and 9 million (exclusive).\r
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\n" ); document.write( "\n" ); document.write( "There are 3000-1000+1 = 2000+1 = 2001 whole numbers that span from 1,000 to 3,000. You can count them yourself, but the handy shortcut formula is \"n-m%2B1\" where m is the starting whole number and n is the ending whole number (and you count by ones).\r
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\n" ); document.write( "\n" ); document.write( "If we exclude the endpoints 1 million and 9 million, then we subtract off 2 to get the final answer of A. 1999
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