Helping students gain understanding and self-confidence in algebra.
stellar wrote:i'm not sure how this is calculus?? you can do this with algebra. the 1st 100 mi are free, so its C(x) = 40 + 0.34*(x-100) if x is the distance, assuming you did more than 100 mi. Its just $40 for 100 and under.
if you've done piecewise stuff, that would probably work here. then for a, just use the number they gave you for the 1st 100, and for b, plug the cost in and solve for x.