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wendy york

wendy y.

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Which of the following best defines objective functions? Points: 0 of 1 A. They are limitations, requirements, or other restrictions that are imposed on any solution in an optimization model. B. They are quantities that an optimization model seeks to maximize or minimize. C. They are unknown values that an optimization model seeks to determine. D. They are quantities for which no feasible solutions exist in an optimization model.

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Employees who have 401(k) plans also have to decide how to invest the funds in their plan. True False

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Soybeans will have several hundred Rhizobium nodules per plant actively fixing nitrogen. Which of the following best describes Rhizobium? Multiple Choice mutualistic bacterium that penetrates the root parasitic plant that invades the root multicellular mycelium that invades the root antagonistic virus that invades the root decomposer soil fungus that invades the root

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Which of the following is false about projective tests? A The validity of projective tests (Rorschach, TAT, etc.) has been well established. B The Exner system provides standardized "normal" answers for the Rorschach so that unusual deviations can be identified. C They aim to reveal one's unconscious feelings, impulses, and desires. D It is never obvious what a "good" answer is, so projective tests are difficult to fake.

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If a ______ binds to the surface of the cell membrane, then a secondary messenger system could be enacted leading to gene expression in the nucleus. O antigen O ligand O lipid O pathogen

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Find the maximum or minimum value of the function.\ f(x) = 7 - 6x - x^2

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this is the correlation coefficient, which says how strong the relationship is ?? OX Or ? Internal Validity External Validity Parameter Statistic Quantitative Variable Categorical Variable Continuity Correction Factor

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Texts: Pick two of the videos and answer the following questions for each of them in your initial post, then reply to at least two of your classmates. Be sure to identify which videos you are answering the questions for. 1 - It is easy to watch a video of a scenario and say "well, I would have done _____." That being said, going on the assumption the bystanders did not know it was a video, do you think they handled the situations well? Why or why not? 2 - How do you feel you might have handled the situation? 3 - What might be done to help people in general have the courage to speak out in aid of others? Answer question 1 & 2 separately for each video. Only answer question 3 once at the end of your post, not for each video.

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1. Consider you have two plane surfaces making contact with each other. The force of attraction between them is F. Now, consider that you modified one surface by incorporating 10,00000 carbon nanotubes (CNTs) standing on the surface. The CNTs are perfectly cylindrical, with 50 nm in diameter and 100 µm in length (height). When this modified surface makes contact with the plane surface, the force of attraction is F1. What is the change in the pull-off force, as you compare both cases? Give numerical answers and show all your calculations, and formulae used.

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Practice Problem 2 For the below given curve in space, find T (unit tangent vector) and k (curvature) r(t) = (\cos t + t \sin t)\mathbf{i} + (\sin t - t \cos t)\mathbf{j} + 3\mathbf{k} What is the value of k (curvature) if t = 2\pi

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