Question 1208093: In 2009 the U.S. Postal Service charged $1.17 postage for first-class mail retail flats (such as an 8.5 inches by 11 inches envelope) weighing up to 1 ounce,plus $0.17 for each additional ounce up to 13 ounces. First-class rates do not apply to flats weighing more than 13 ounces. Develop a model that relates C, the first-class postage charged, for a flat weighing x ounces. Graph the function.
Answer by ikleyn(52787)   (Show Source):
You can put this solution on YOUR website! .
The model that you request is THIS
1.17 dollars at 0 < x <= 1 ounces,
C(x) =
1.17+0.17x dollars at 1 < x < = 13 ounces,
where x is the weight, in ounces.
Solved and explained.
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Comment from student: You provided the model function but didn't explain how you do it.
My response:
(1) This model function is SELF-EXPLANATORY.
It means that you should look in it and listen it, and the formula will tell you everything about itself.
I specially left it without explicit explanations in order for your mind had a room for your independent thinking.
(2) You provided your comment, but forgot to say " Thank you for your teaching ".
It is quite low level of communicating with a tutor (first basic rule of polite communication is violated).
I am very disappointed to see so low level.
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