document.write( "Question 1100788: The cost C, in dollars, to fill a sandbox varies directly as the depth S, in inches, of the sand. The director of Creekside Daycare checks at her local hardware store and finds that it would cost $31.50 to fill the daycare's box with 3 in. of sand. She decides to fill the sandbox to a depth of 10 in.
\n" ); document.write( "a) Find an equation of variation.
\n" ); document.write( "b) How much will the sand cost? \n" ); document.write( "

Algebra.Com's Answer #715334 by Boreal(15235) $\"\"$ $\"About$

You can put this solution on YOUR website!
31.50=k*3; C=k*S
\n" ); document.write( "k=31.50/3=10.50
\n" ); document.write( "use this is the second equation.
\n" ); document.write( "C=10.50*10=$105. \n" ); document.write( "

\n" );