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)![]() ![]() ![]() You can put this solution on YOUR website! 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( "..\r \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 \n" ); document.write( " |