Suppose a long-distance phone call costs $0.75 for the first minute (or any part of the first minute), plus $0.10 for each additional minute (or any part of a minute).

a. Graph the function c = f(t) that gives the cost for talking on the phone for t minutes, for 0 t 5. b. Evaluate lim f(t). t-2.9 c. Evaluate lim f(t) and lim f(t). t-3+ d. Interpret the meaning of the limits in part (c). e. For what values of t is f continuous? Explain.