document.write( "Question 343481: the future value of a simple interest investment is given by S = P(1+rt). What principal P must be invested for t=5years at the simple interest rate r=10% so that the future value grows to $9000? \n" ); document.write( "
Algebra.Com's Answer #245801 by solver91311(24713)\"\" \"About 
You can put this solution on YOUR website!
\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "Re-arrange your formula to solve for P:\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "Now just plug in your numbers and do the arithmetic.\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "John
\n" ); document.write( "
\n" ); document.write( "My calculator said it, I believe it, that settles it
\n" ); document.write( "
\n" ); document.write( "
\n" ); document.write( "
\n" );