document.write( "Question 905821: a tank fills in 30 minutes. the water in it doubles in each minute. then how long will it take to fill half the tank? \n" ); document.write( "
Algebra.Com's Answer #549416 by richwmiller(17219)\"\" \"About 
You can put this solution on YOUR website!
29 minutes \n" ); document.write( "
\n" );