document.write( "Question 1048509: The formula A = P(1 + r)2 is used to find the amount of money, A, in an account after P dollars have been invested in the account paying an annual interest rate, r, for 2 years. Find the interest rate r if $500 grows to $845 in 2 years. \n" ); document.write( "
Algebra.Com's Answer #664134 by jorel555(1290)![]() ![]() ![]() You can put this solution on YOUR website! 845=500(1+r)² \n" ); document.write( "845/500=(1+r)² \n" ); document.write( "1.69=(1+r)² \n" ); document.write( "1+r=1.3 \n" ); document.write( "r=30%. ☺☺☺☺ \n" ); document.write( " |