Survey of Calc hw help?

Posted on 2015-11-20 06:26:00 in Math by FARK

The top and bottom margins of a poster are 4 cm (w) and the side margins are each 6 cm (h). If the area of printed material on the poster is fixed at 388 square centimeters, find the dimensions of the poster with the smallest area.
-What is the width of the printed material, as a function of w?
-What is the height of the printed material, as a function of h?
-Use the fact that the area of the printed material must be fixed at 388 square centimeters to write h as a function of w.
-Write the formula for the area A(w) of the entire poster as a function of w only
-Find the critical number c of A(w) which lies in the interval (12, \infty):

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