SOLUTION: Loudon County Phone Company charges a $100 activation fee plus a monthly fee of $0.05 per minute for every minute over 200 minutes each month. (So, there is no monthly charge for

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Question 860644: Loudon County Phone Company charges a $100 activation fee plus a monthly fee of $0.05 per minute for every minute over 200 minutes each month. (So, there is no monthly charge for 0 – 200 minutes of use per month).
(a) Write an equation that can be used to determine a new subscriber’s first month’s phone bill, B(x), given the amount of minutes called, x. (Assume that the subscriber will make over 200 minutes of calls)
(b) Determine the subscriber’s first month’s bill if the total minutes used was 650. Show work.
(c) Determine the number of minutes used if the new subscriber’s first month bill was $114. Show work.
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!
 

Hi,

B(x) = .05x + $90    |Note: $100 -$10(free minutes)= $90

B(650) = .05*650 + 90



 $114 = .05x + 90

  24 = .05x

  480min = x