Solve by using the simplex method.Maximize50x1+ 35x2subject to3x1+ x2? 24x1?+ x2? 162x1+ 3x2? 30and x1 ? 0, x2 ? 0
A. Maximum = 400 when x1 = 8 and x2 = 0
B. Maximum = 350 when x1 = 0 and x2 = 10
C. Maximum = 620 when x1 = 4 and x2 = 12
D. Maximum = 510 when x1 = 6 and x2 = 6
Answer: D
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Solve the inequality analytically. Support the answer graphically. Give exact values for endpoints.x2 - 6x - 7 ? 0
A. [7, ?) B. [-1, 7] C. (-?, -1] D. (-?, -1] ? [7, ?)
Solve the problem.A closed box with a square base has to have a volume of 17,000 cubic inches. Find a function for the surface area of the box.
A. S(x) = 2x2 + 
B. S(x) = x2 + 
C. S(x) = 2x2 + 
D. S(x) = 2x2 + 
Decide whether or not the function is a probability density function on the indicated interval.f(x) = 
x2; [3, 5]
A. No B. Yes
Solve the problem.The graph shows the average cost of a barrel of crude oil for the years 1981 to 1990 in constant 1996 dollars. Find the approximate average change in price from 1981 to 1990.1996 $/Barrel 
Year
A. About -$1/year B. About -$24/year C. About -$4/year D. About -$44/year