Express the sum using summation notation.6 + 
+ 
+ ... + 
A. 
B. 
C. 
D. 
Answer: B
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Find Dxy.y = 
A. 
B. 
C. 
D. 
Solve the problem.Find the optimum number of batches (to the nearest whole number) of an item that should be produced annually (in order to minimize cost) if 270,000 units are to be made, it costs $2 to store a unit for one year, and it costs $520 to set up the factory to produce each batch. Assume that units of this item will be sold off throughout the year, so the cost equation will use the average cost.
A. 18 batches B. 16 batches C. 25 batches D. 23 batches
Suppose 
. If the limiting value of z is 0, what is the limiting value of w?
?
A. 7 B. 0 C. 9 D. None of the above
Solve the problem.A rectangular enclosure must have an area of at least 1200 yd2. If 160 yd of fencing is to be used, and the width cannot exceed the length, within what limits must the width of the enclosure lie?
A. 20 ? w ? 40 (yards) B. 40 ? w ? 60 (yards) C. 0 ? w ? 20 (yards) D. 20 ? w ? 60 (yards)