WeBWorK Standalone Renderer

A mobile plan charges a base monthly fee of $13.00 for the first 500 minutes of air time plus a charge of $0.25 for each additional minute. Write a piecewise-defined linear function which calculates the monthly cost $C$ (in dollars) for using $m$ minutes of air time.

$\displaystyle C(m) = \left\lbrace \begin{array}{cc} &\\ &\\ &\\ &\\ &\\ &\\ &\\ &\\ &\\ &\\ \end{array}\right.$

if $\leq$ $m$ $\leq$

if $m$ $>$

You can earn partial credit on this problem.