a mobile phone company charges $30 for up to 500 minutes of use each month. each additional minute over 500 minutes cost $0.40 per minute.
A. Write a piecewise function to show the cost of using x minutes.
B. How much does a customer pay if the customer uses 600 minutes in one month? show your work.
A. Write a piecewise function to show the cost of using x minutes.
B. How much does a customer pay if the customer uses 600 minutes in one month? show your work.
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f(x) = $30 if x
= 30 + (0.4)x if x>500.
f(600) = 30 + (0.4)(100) = $70.
f(600) = 30 + (0.4)(100) = $70.