document.write( "Question 1186790: All edges of a cube are expanding at a rate of 5 centimeters per second.\r
\n" ); document.write( "\n" ); document.write( "(a) How fast is the surface area changing when each edge is 3 centimeters?\r
\n" ); document.write( "\n" ); document.write( "(b) How fast is the surface area changing when each edge is 10 centimeters?
\n" ); document.write( " \n" ); document.write( "

Algebra.Com's Answer #817760 by ikleyn(52874) $\"\"$ $\"About$

You can put this solution on YOUR website!
.
\n" ); document.write( "All edges of a cube are expanding at a rate of 5 centimeters per second.\r
\n" ); document.write( "\n" ); document.write( "(a) How fast is the surface area changing when each edge is 3 centimeters?\r
\n" ); document.write( "\n" ); document.write( "(b) How fast is the surface area changing when each edge is 10 centimeters?
\n" ); document.write( "~~~~~~~~~~~~~~~~~~~\r
\n" ); document.write( "
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "

\r\n" );
document.write( "The surface area  of a cube is  A = , where \"a\" is the edge measure.\r\n" );
document.write( "\r\n" );
document.write( "\r\n" );
document.write( "  (a)  the rate of change the surface area of the cube is\r\n" );
document.write( "\r\n" );
document.write( "\r\n" );
document.write( "            =   cm^2 per second.\r\n" );
document.write( "\r\n" );
document.write( "\r\n" );
document.write( "       Now substitute given values  a = 3 cm,   = 5 cm per second into the formula and get\r\n" );
document.write( "\r\n" );
document.write( "            =  =  = 180  cm^2 per second.    ANSWER\r\n" );
document.write( "\r\n" );
document.write( "\r\n" );
document.write( "\r\n" );
document.write( "\r\n" );
document.write( "  (b)  Solve  it by the same way as (a)\r\n" );
document.write( "

\r
\n" ); document.write( "\n" ); document.write( "Solved.\r
\n" ); document.write( "
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( " \n" ); document.write( "

\n" );