A rechargeable battery is plugged into a charger. The graph shows C(t), the percentage of full capacity that the battery reaches as a function of time elapsed (in hours).
(a) What is the meaning of the derivative C'(t)?
(b) Sketch the graph of C'(t). What does the graph tell you?

Transcribed Image Text:

100 80 percentage 60 40 20 of full charge 01 2 4 6 8 10 12 t(hours)