document.write( "Question 1197622: I need to write the area of a water puddle as a function of its radius using function notation. Each minute, the radius increases by 0.1cm. I have tried to model this with a quadratic equation, but I am not sure whether \"a\" should be the time value or the radius value. I greatly appreciate any help you can offer! \n" ); document.write( "
Algebra.Com's Answer #830970 by ikleyn(52790)\"\" \"About 
You can put this solution on YOUR website!
.\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "You try to re-tell the problem in your own words, but some important details remain unclear.\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "Does this problem have a standard formulation in the textbook ?\r
\n" ); document.write( "
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "==================\r
\n" ); document.write( "
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "OK, I got a comment/(an info) from you describing your problem.\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "
\r\n" );
document.write( "So, our puddle grows from zero, so the radius is  \r\n" );
document.write( "\r\n" );
document.write( "      r = 0.1*t,  where the radius r is in centimeters and time t is in minutes.\r\n" );
document.write( "\r\n" );
document.write( "\r\n" );
document.write( "\r\n" );
document.write( "The area of the puddle is the area of the circle\r\n" );
document.write( "\r\n" );
document.write( "    area = \"pi%2Ar%5E2\" = \"3.14%2A%280.1t%29%5E2\" = \"3.14%2A0.01%2At%5E2\" = \"0.8314%2At%5E2\".\r\n" );
document.write( "
\r
\n" ); document.write( "\n" ); document.write( "Is everything clear to you so far ?\r
\n" ); document.write( "
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "
\n" ); document.write( "
\n" );