a) Find a formula for the height of the printed area (h) in terms of its width (w). b) Show that the total area (A) of the entire notice board (including the margins) is given by: 8000 A = 820 + 20w +9 W c) Find the dimensions of the entire board (including the margins), which minimizes the quantity of board required. d) Check that these dimensions indeed give a minimum value as opposed to a maximum. h W

Add / subtract number 6

Please give the intersection and write the solution set in interval notation x >= 5 and x >= 4   ^greater than or equal to ( >= )

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