SOLUTION: A cell phone company charges a monthly fee of $40 plus 1.5 cents per minute of call time. a) Write the monthly cost function C(t) where t is the amount of time in minutes of call

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Question 786172: A cell phone company charges a monthly fee of $40 plus 1.5 cents per minute of call time.
a) Write the monthly cost function C(t) where t is the amount of time in minutes of call time in a month.
b) State the domain and range
Answer by stanbon(75887) About Me  (Show Source):
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A cell phone company charges a monthly fee of $40 plus 1.5 cents per minute of call time.
a) Write the monthly cost function C(t) where t is the amount of time in minutes of call time in a month.
C(t) = 4000 + 1.5x cents
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b) State the domain and range
Domain:: All integers >= 0
Range:: All rational numbers of the form 4000+1.5x
where x is a non-negative number.
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Cheers,
Stan H.
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