document.write( "Question 408364: kane's grandfather deposited some money for him when he was born and it eared 12%p.a. interest, compounded quarterly, untill he turned 21. if he recieved a cheque for $25,000, what was the initial deposit? \n" ); document.write( "
Algebra.Com's Answer #287714 by lwsshak3(11628)\"\" \"About 
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kane's grandfather deposited some money for him when he was born and it eared 12%p.a. interest, compounded quarterly, untill he turned 21. if he recieved a cheque for $25,000, what was the initial deposit
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\n" ); document.write( "\n" ); document.write( "The formula to use here:
\n" ); document.write( "A=P(1+r)^n, where,
\n" ); document.write( "A=amt earned
\n" ); document.write( "P=Initial investment=what we want to find out
\n" ); document.write( "r=interest per period=.12/4=.03
\n" ); document.write( "n=number of periods=21*4=84\r
\n" ); document.write( "\n" ); document.write( "25000=P(1+.03)^84
\n" ); document.write( "25000=P(1.03)^84
\n" ); document.write( "P=25000/(1.03)^84
\n" ); document.write( "P=$2087.44
\n" ); document.write( "ans:
\n" ); document.write( "The initial deposit 21 years ago=$2087.44
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