Give the largest interval where the function increases or decreases, as requested.f(x) = -5x2 + 4; decreases
A. 
B. (0, ?)
C. 
D. (0, -?)
Answer: B
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For an election with four candidates (A, B, C, and D) we have the following preference schedule:
The ranking of the candidates using the plurality-with-elimination method is
A. first: C; second: A; third: D; fourth: B. B. first: C; second: A; third: B; fourth: D. C. first: C; second: D; third: A; fourth: B. D. first: D; second: C; third: A; fourth: B. E. none of these
Convert as indicated.7.9 kl to liters
A. 0.079 L B. 790 L C. 0.0079 L D. 7900 L
Factor any perfect square trinomial, or state that the polynomial is prime.121x2 - 22x + 1
A. (11x + 1)(11x - 1) B. prime C. (11x - 1)2 D. (x - 11)2
Solve the problem.The revenue achieved by selling x graphing calculators is figured to be 
dollars. The cost of each calculator is 
How many graphing calculators must be sold to make a profit (revenue - cost) of at least $67.50?
A. {x ? 11 < x < 13} B. {x ? 12 < x < 18} C. {x ? 10 < x < 14} D. {x ? 9 < x < 15}