WeBWorK using host: https://math-webwork3.unl.edu, format: simple seed: 123567890

An electrical circuit switches instantaneously from a 8 volt battery
to a 22 volt battery 8 seconds after being turned on. Sketch on a
sheet of paper a graph the battery voltage against time. Then fill in
the formulas below for the function represented by your graph.

For ,
For , .

At what point or points is your function discontinuous?
(Give your answer as a comma-separated list, or enter the
word none if there are no discontinuities.)