Suppose your cell phone company offers two plans. The pay-per-call plan charges 14 dollars per month plus 6 cents per minute. The unlimited-calling plan charges a flat rate of 22 dollars per month.
a) Write the function that gives the cost c in dollars for making m minutes of phone calls per month on the pay-per-call plan.
c(m)=?
b) How many minutes per month must you use for the unlimited-calling plan to become cheaper?
Time: ? minutes (or more)
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