Asked by Brianna

a cell phone company offers the following plan: monthly charge (which includes 500 minutes) for $40 and a charge for additional minutes will be 5 cents a minute. write a piecewise function function putting x&y terms that can be used in any # or minutes.

I am coming up with y=.05x+40 when x>500. Although I'm not sure.
Answered by Steve
close. You forgot the first piece

y = 40 when 0 <= x <= 500
y = 40+.05x when x > 500

I guess we can assume that negative minutes are to be disregarded as a possibility.
Answered by Anonymous
If you talk for 375 minutes in a month how much is your monthly bill
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