(b)(4 pts) Find both CVs (critical values) for y in [1a] above. Then test each CV by filling in the 7 empty boxes of the table (right). Note that the table at the right is a   1st derivative test Review these ideas?? test value CV test value CV test value x -2   2   5 y '(x)           comments Rel. Max. Rel. Min. Ledge Rel. Max. Rel. Min. Ledge

[2]		Once upon a time, there was a wicked Math Prof who loved to write word problems...
	(#5 Pg 260 underlined number changed) COMPUTER WORLD is currently selling the DVD-copier X-COPY for $40 per box, and at that price has been selling 50 boxes per month. The store plans to change the price, and estimates that for each $1 increase in price,  5  fewer boxes will be sold each month. If the manufacturer charges COMPUTER WORLD $25 for each box of X-COPY, at what selling price x will COMPUTER WORLD maximize its profit P on all boxes of X-COPY sold?
	(3 points) For the problem in the box above, complete the equation which expresses the relationship between x and P (show work: one number given as a reality check). [Note : x = "selling price of one box of X-COPY " : you must not change this definition of x]
	P(x) = x2 + x + -6250
	In the space below, differentiate the above P twice and find any CVs of P (for one point). Finally (for one more point) name the value of x at which P is largest.
	P '(x) =
	P "(x) =
	Thus, P is biggest when x =
	See a similar worded problem translated ?