Question

Tracy has a cell phone plan that provides 250 free minutes each month for a flat rate of $29. For any minutes over 250, Tracy is charged $0.35 per minute. Which of the following piecewise functions represents charges based on Tracy's cell phone plan?

A. f(x)={29,x less than or equal to 250}
{20+.35x,x>250}
B. f(x)={29,x>250}
{20+.35x,xless than or equal to 250}
C. f(x)={29,xless than or equal to 250}
{.35x,x>250}
D. f(x)={29,xless than or eual to 250}
{29+.35(x-250),x>250}