document.write( "Question 218652: 1..calculate the simple interest on a loan of $18.500 at 11% annual interest for 18months.
\n" ); document.write( "2..an amusement park purchased equipment from a manufacturer for a list price 42,000,minus trade discounts of 30/20/15. calculate the amount of trade discount on the purchase.
\n" ); document.write( "3...a retail jewler sells a pair of gold earrings for 213.90. the jewler uses a 130% markup based on cost. what was thw wholesale cost of the earrings.
\n" ); document.write( "4..what would be the amount of compound interest on $6,000 invested for two years at 9% compounded semiannually?
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Algebra.Com's Answer #164694 by rfer(16322)\"\" \"About 
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1)
\n" ); document.write( "I=Prt
\n" ); document.write( "I=18500(.11)(1.5)=3052.50
\n" ); document.write( "2)
\n" ); document.write( "42000(.7)=29400
\n" ); document.write( "29400(.8)=23520
\n" ); document.write( "23520(.85)=19992
\n" ); document.write( "42000-19992=$22,008 discount
\n" ); document.write( "3)
\n" ); document.write( "213.90/2.30=$93\r
\n" ); document.write( "\n" ); document.write( "4)
\n" ); document.write( "A=P(1+r/n)^nt
\n" ); document.write( "A=6000(1+.09/2)^2*2
\n" ); document.write( "A=6000(1.045)^4
\n" ); document.write( "A=6000(1.1925186)
\n" ); document.write( "A=7155.11
\n" ); document.write( "7155.11-6000=$1155.11 interest\r
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