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jeffrey walker

jeffrey w.

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5. Differentiate with respect to \( x \) : (a) \( \frac{3}{\sin (3 x+\pi)} \) (b) \( \frac{5}{\tan ^{2}(2 x+\pi)} \) (c) \( \frac{2}{\cos ^{3}\left(4 x+\frac{\pi}{2}\right)} \) (d) \( \tan \frac{5}{x^{2}} \) (e) \( \sec ^{2} 3 x \) (f) \( \cot ^{3} 5 x \) (g) \( \frac{\sin x-\cos x}{\sin x+\cos x} \) (h) \( 3 x^{2} \tan ^{2}(x+\pi) \) (i) \( 3 x \cos 5 x-5 x \tan 3 x \)

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In the Strange Situation tasks, Mary Ainsworth observed that securely attached infants Question 2 Answer a. do not seem to care when the mother leaves the room and do not seek her out on her return. b. protest loudly when the mother leaves but resist contact with her when she returns. c. cry if the mother leaves the room, are easily soothed, and welcome her back when she returns. d. are not concerned upon separation but cry when picked up and held on her return.

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12. Calculate and label the currents in the wires labelled A, B, and C.

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1) (20 pts total) Linear Algebra: a) (4 pts) Write the 2x2 Identity Matrix I. b) (4 pts) Write the system of linear equations given below in matrix form Ax=b: 5x + 2.5y + x = 2.5 10x - 20y + 5z = 50 3x + 7y + 8z = 10 c) (4 pts) If a system of equations can be written in the form Ax=b, where A is a square matrix, then x is called an (circle one): - eigenvector - eigenvalue - eigenspace - idk d) (4 pts) If a system of equations can be written in the form Ax=Ax, where A is a square matrix, then x is called an (circle one): - eigenvector - eigenvalue - eigenspace - idk e) (2 pts) I learned about linear algebra in the following class(es): (circle all that apply) - MAT316 - EE280 - CS122 - high school - Other (list) - None f) (2 pts) My understanding of linear algebra is: (circle one) - Minimal - Moderate - Good - Very Good - Excellent 2) (20 pts total) Laplace Transformations: a) (5 pts) True or False (circle one): The Laplace transform F(s) of a function f(t) is defined as: - Fs - -stf(t) - at - b b) (6 pts) What is the Laplace transform of f(t) = e^t?

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Oriole Repairs has 200 auto-maintenance service outlets nationwide. It performs primarily two lines of service: oil changes and brake repair. Oil change-related services represent 60% of its sales and provide a contribution margin ratio of 15%. Brake repair represents 40% of its sales and provides a 45% contribution margin ratio. The company's fixed costs are $15,552,000 (that is, $77,760 per service outlet). Calculate the dollar amount of each type of service that the company must provide in order to break even. (Use Weighted-Average Contribution Margin Ratio rounded to 2 decimal places e.g. 0.25 and round final answers to 0 decimal places, e.g. 2,510.) Oil changes $ Brake repair $ eTextbook and Media The company has a desired net income of $49,977 per service outlet. What is the dollar amount of each type of service that must be performed by each service outlet to meet its target net income per outlet? (Use Weighted Average Contribution Margin Ratio rounded to 2 decimal places e.g. 0.25 and round final answers to 0 decimal places, e.g. 2,510.) Oil changes $ Brake repair $

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Part B Two moles of an ideal gas occupy a volume V. The gas expands isothermally and reversibly to a volume 3V. For related problem-solving tips and strategies, you may want to view a Video Tutor Solution of A microscopic calculation of entropy change. Use the equation $\Delta S = k \ln \frac{v_2}{v_1}$ to calculate the change in entropy of the gas. $\Delta S =$ J/K Submit Request Answer Part C Use the equation $\Delta S = \frac{Q}{T}$ to calculate the change in entropy of the gas. $\Delta S =$ J/K Submit Request Answer

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Let us consider a single-phase ac voltage connected to a purely resistive load through a rectifier. Which statement is TRUE comparing the different diode-based rectifier topologies? Select one: a. The average of the output dc voltage is the same for a half-wave and full-wave rectifier. b. The peak inverse voltage of the diode in the half-wave rectifier and centre-tapped full-wave are same. c. Diodes conduct in pairs in both centre-tapped and full-bridge rectifiers. d. The peak inverse voltage of the diode in the half-wave rectifier and full wave bridge rectifier are the same.

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Find the value of f given a VVVV 6V rie 5 50 80

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Find the number of permutations {1, 2, 3,...,8 } such that: 1) Exactly 4 digits in their usual place. 2) Keep at least one odd number in the usual place. The topic is Combinations and Permutations please explain

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What is the saturation pressure (in kPa) if the temperature of the water is 20 degree Celsius?

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