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.
C(t) = 4000 + 1.5x  cents
------------ 
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.
=================
Cheers,
Stan H.
=================