SOLUTION: 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 add

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.

======================

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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