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# Anone bone ctwo dthree emorethanthree c 2and4 66

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Unformatted text preview: ­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­ 28. 3377­!­item­!­187;#058&003297 If xy = 1, what is the value of 2^[(x+y)^2] / 2^[(x­y)^2] ? (A) 2 (B) 4 (C) 8 (D) 16 (E) 32 ­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­ 作作作作D 2 2 2 2 2 2 2 2( x + y ) 2( x + 2 xy + y ) xr r −s = ( x2 −2 xy+ y2 ) = 2 x + 2 xy + y − x + 2 xy − y = 24 xy 作作作作作作 ,由由 =x 2 2( x − y ) xs 2 4 xy=1,作the value= 2 =16 ­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­ 29. 3426­!­item­!­187;#058&003323 The value of the expression above is closest to which of the following? (A) 0.0001 (B) 0.001 (C) 0.1 (D) 1 (E) 10 30. 3528­!­item­!­187;#058&003455 A furniture dealer purchased a desk for \$150 and then set the selling price equal to the purchase price plus a markup that was 40 percent of the selling price. If the dealer sold the desk at the selling price, what was the amount of the dealer's gross profit from the purchase and the sale of the desk? (A) \$40 (B) \$60 (C) \$80 (D) \$90 (E) \$100 ­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­ 作作作作E 作作作作selling price=the purchase price+ 40%selling price selling price =150+0.4x selling price 0.6 selling price=150 selling price=250, the gro...
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## This note was uploaded on 12/05/2012 for the course BUSINESS Finance taught by Professor Zheng during the Winter '05 term at Xiamen University.

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