Solve the linear programming problem.A doctor has told a sick patient to take vitamin pills. The patient needs at least 6 units of vitamin A and at least 6 units of vitamin B. The red vitamin pills cost 
each and contain 1 unit of A and 2 units of B. The blue vitamin pills cost 
each and contain 2 units of A and 1 unit of B. To avoid indigestion, the patient should take no more than 4 red pills and no more than 7 blue pills. How many pills should the patient take each day to minimize costs?
A. 4 red and 7 blue
B. 2 red and 2 blue
C. 4 red and 1 blue
D. 0 red and 6 blue
Answer: C
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Solve the problem.A line from the top of a cliff to the ground passes just over the top of a pole 6.0 ft high and meets the ground at a point 7.0 ft from the base of the pole. If the point is 68 ft from the base of the cliff, how high is the cliff? Round to the nearest unit.
A. 58 ft B. 408 ft C. 5 ft D. 2856 ft
For an election with four candidates (A, B, C, and D) we have the following preference schedule:
Using the plurality-with-elimination method, which candidate wins the election?
A. A B. B C. C D. D E. none of these
Graph the inequality.3x + 4y ? 12
A. 
B. 
C. 
D. 
Find all the zeros of the function and write the polynomial as a product of linear factors. ? x2 + 49 ?
A. 7i; (x + 7i)(x - 7i) B. -7i; (x + 7i)(x - 7i) C. ±7i; (x + 7)(x - 7) D. -7i; (x + 7)(x - 7) E. ±7i; (x + 7i)(x- 7i)