Find the indicated derivative.Find y " if y = -6 cos x.
A. y " = -6 cos x
B. y " = -6 sin x
C. y " = 6 cos x
D. y " = 6 sin x
Answer: C
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Determine whether the infinite geometric series converges or diverges. If it converges, find its sum.-15 - 5 - 
- ...
A. Converges; - 
B. Converges; - 
C. Converges; 
D. Diverges
Solve the problem.A radio telescope has a parabolic surface. If it is 9 m deep and 
wide, how far is the focus from the vertex?A = 12 mB = 9 m
A. 1 m B. 9 m C. 4 m D. 3 m
Solve the problem.A spreadsheet contains 805 entries in a rectangular array which has 35 rows. How many entries are in each row?
A. 28,175 B. 23 C. 770 D. 33
Formulate but do not solve the following exercise as a linear programming problem.
Deluxe River Cruises operates a fleet of river vessels. The fleet has two types of vessels: A type-A vessel has 70 deluxe cabins and 150 standard cabins, whereas a type-B vessel has 80 deluxe cabins and 110 standard cabins. Under a charter agreement with Odyssey Travel Agency, Deluxe River Cruises is to provide Odyssey with a minimum of 390 deluxe and 690 standard cabins for their 15-day cruise in May. It costs $43,000 to operate a type-A vessel and $52,000 to operate a type-B vessel for that period. How many of each type vessel should be used in order to keep the operating costs to a minimum?
