Complete the trinomial so that it is a perfect square.m2 + 5m +
A. 
B. 
C. 
D. 
Answer: B
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Find Dxy.y = ln(sech (4x + 10))
A. tanh (4x + 10)
B. 
C. -4 tanh (4x + 10)
D. -tanh (4x + 10)
Find an upper bound for the magnitude |E| of the error in the approximation f(x, y) ? L(x, y) at the given point over the given region R.
at (1, 1, 1); R: |x - 1| ? 0.1, |y - 1| ? 0.1, |z - 1| ? 0.1
A. |E| ? 0.0165 B. |E| ? 0.0248 C. |E| ? 0.0198 D. |E| ? 0.0186
Solve the problem.A researcher interested in Cleansburg citizens' attitudes toward a revitalized downtown area surveys a randomly selected group of 200 downtown office workers. 66% of those surveyed indicated they are in favor of revitalizing the downtown area. The researcher concluded that "about two thirds of the people in Cleansburg are in favor of revitalizing the downtown area." This conclusion might be invalid because
A. there was no control group. B. the size of the sample is too small. C. 66% is not exactly two thirds. D. the sample is not representative of the population. E. none of these
Solve the problem.The profit made when t units are sold, t > 0, is given by 
Determine the number of units to be sold in order for P > 0 (a profit is made).
A. 20 < t < 14 B. t = 34 C. t > 20 or t < 14 D. t = 20 or t = 14