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cynthia mclaughlin

cynthia m.

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Let X be a continuous random variable uniformly distributed on (0,1). Find the expected value of−2 log X.

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Pat believes that the reason for her success in reading is the effort she puts into it. Pat is reflecting what type of locus of control? External Internal Stable Transitional

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(Table: Workers and Buns Produced) Use the table Workers and Buns Produced. What is the marginal product of the fifth worker? Table: Workers and Buns Produced Workers Buns Produced Marginal Product 0 0 — 1 50 2 125 3 4 5 205 6 215 7 8 215 A 10 B 30 C 5 D 205

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Financial break-even is the sales level that results in ________. ? an NPV of zero ? a positive NPV ? an IRR that is less than the NPV ? a positive IRR

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Consider the following nuclides: which would you expect to be radioactive? • 44K • 27Al • 127I • 232Th The correct answer is [Select]

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Question 35 In order for a good to be classified as __________, when one person uses the good, others are also able to use it. nonrivalrous unrivalrous unexcludable nonexcludable

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Suppose that the demand function for x units of a certain item is \begin{equation*} p = 110 + \frac{180 \ln(x+5)}{x} \end{equation*} where p is the price per unit, in dollars. Find the marginal revenue, $\frac{dR}{dx}$.

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1. (10 points) When the light of wavelength 350 nm falls on a potassium surface, electrons are emitted that have a maximum kinetic energy of 1.31 eV. Find: a) the work energy function of potassium, b) the cutoff wavelength, c) the frequency corresponding to the cutoff wavelength. 2. An object of the height 5 cm is placed 50 cm in front of the converging lens with f=30 cm. Determine (1) the position, (2) the magnification, of the final image formed by the converging lens. Draw the ray diagram. Replace the converging lens by the spherical mirror with focal distance with f=30 cm so that the same object is located on the same distance 50 cm from the mirror. Determine (1) the position, (2) the magnification, of the final image formed by the spherical mirror. Draw the ray diagram. 3. (10 points) Find the direction of the magnetic field for each case in Fig. 1, where F represents the maximum magnetic force that acts on (a) a negative charged particle (Fig la) moving with velocity v; (b) electric current I (Fig. 1b)

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Suppose that the spinal canal cross-sectional area in square cm between vertebra L5 and S1 for certain patients has a distribution with mean 3.31 and standard deviation 1.5. What is the probability that the average area for a sample of 40 is larger than 3.75? 1 0.032 0.381 0.01

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Item ROI Margin Anticipated change New amount Responsible for generating profits and making investments in their store. The following data is provided for the 2019 operations for one of the stores: Boston store Sales $902,000 Net operating income $59,000 Average operating assets $417,000 Minimum required rate of return 12% Residual income ii. If the store manager's performance is evaluated on the basis of ROI, would you expect them to accept or reject plan one? Why? Required: (a) Calculate the store's ROI for 2019. iii. If the store manager's performance is evaluated on the basis of residual income, would you expect them to accept or reject plan one? Why? (b) Calculate the store's margin for 2019. b. In the second plan, the store would increase its average operating assets by 10% and increase its sales by $48,000, and as a result, increase its net operating income by $5,200. i. If it adopts the second plan, fill in the Anticipated change column to state whether each of the following would increase, decrease, or stay the same, and use the New amount column to show what the amounts for each one would be under plan two: Item Anticipated change New amount ROI Margin Turnover Residual income (c) Calculate the store's turnover for 2019. (d) Calculate the store's residual income for 2019. ii. If the store manager's performance is evaluated on the basis of ROI, (e) The store manager is considering two different plans for 2020. Consider each plan independently. In the first plan, the store would increase its operating expenses by $16,500. i. If it adopts the first plan, fill in the Anticipated change column to state whether each of the following items would increase, decrease, or stay the same, and use the New amount column to show what the amounts for each one would be under plan one: iii. If the store manager's performance is evaluated on the basis of residual income, would you expect them to accept or reject plan two? Why?

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