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emily duran

emily d.

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Are you smarter than a second-grader? A random sample of 62 second-graders in a certain school district are given a standardized mathematics skills test. The sample mean score is =x57 . Assume the standard deviation of test scores is =σ14 . The nationwide average score on this test is 59 . The school superintendent wants to know whether the second-graders in her school district have weaker math skills than the nationwide average. Use the =α0.10 level of significance and the critical value method. Part 1 of 5 (a) State the appropriate null and alternate hypotheses. :H0 =μ59 :H1 <μ59 This hypothesis test is a ▼left-tailed test. Part 2 of 5 Find the critical value(s). Round the answer(s) to three decimal places, if necessary. If there is more than one critical value, separate them with commas. Critical value(s): −1.282 Part 3 of 5 (b) Compute the value of the test statistic. Round the answer to at least two decimal places. =z−1.12 Part 4 of 5 Determine whether to reject H0 . ▼Do not reject the null hypothesis H0 . Part: 4 / 5 4 of 5 Parts Complete Part 5 of 5 (c) State a conclusion. There ▼(Choose one) enough evidence to conclude that the second-graders in the superintendent's school district have weaker math skills than the nationwide average.

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Tom is a self-employed accountant. He uses one room of his house exclusively and regularly as an office for the business. The square footage of the room comprises 10% of the total square footage of the home. Tom incurred the following expenses related to the home during the tax year: Utilities$1,500Property tax$600Mortgage interest$4,000Insurance on home$750Maid service$1,200Misc. repairs$950 If Tom's office meets the tax law requirements of a qualified home office and the gross income from the business limitations on the deduction are ignored, what is the maximum business deduction Tom can take? A) $900 B) $805 plus a depreciation deduction based on 10% of the cost of the home C) $780 plus a depreciation deduction based on 10% of the cost of the home D) $900 plus a depreciation deduction based on 10% of the cost of the home

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Firms that produce a particular product can sometimes use their facility to produce an alternative product; therefore, when the price of the alternative good increases, the producer may switch to that alternative good in order to increase profits. This decision is called O change in supply O substitution of producer expectations Osubstitution in production O substitution of technology

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Compute the derivative of the given function.\\ $f(x) = \frac{2 \sin x}{-4 \cos x + 5}$\\ f'(x) = \boxed{ }

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1) Derive the equation for steady-state laminar flow inside the annulus between two concentric vertical pipes.This type of flow occurs often in concentric pipe heat exchangers. a)Write the equation of continuity in spherical coordinates. Then, find dVz/dz for a steady state,incompressible flow and explain. b) Start with using N-S equation given below.Derive the equation for steady-state viscous flow. (You need to explain every step of what you do.) vedv, ne dp V ie de r ee az dz 1av av, 0 +p9 rar ar az c) Find velocity profile, for the given boundary conditions. Vz=0at r =ro V=Voatr=ri

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Let f(x) = kx^3. (a) Show that the point P(2, 8k) lies on the curve of f. At P, the normal to the curve is parallel to y = 1/6x. (b) Find the value of k.

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(20') Write an assembly language program that compares the elements of two arrays, A(I) and B(I). Each array contains 100 16-bit signed numbers. Compare the corresponding elements of the two arrays until either two elements are found to be unequal or all elements of the arrays have been compared and found to be equal. Assume that the arrays start in the current data segment at offset address A000H and B000H, respectively. If the two arrays are found to be unequal, save the address of the first unequal element of A(I) in the memory location with offset address [FOUND] in the current data segment; otherwise, write all 0s into this location. Hints: You need both branch and loop structures for this question. An example algorithm might be: Initialize counter CX=100D, Initialize SI, Initialize DI, RPT: Move word data from [SI] to AX Compare AX with [DI], Jump to Mismatch case if they are not equal, Increment SI by 2, Increment DI by 2. Decrement CX, Jump to RPT again if CX is not zero, Set [FOUND]=0000H ;If all data compared and no unequal element is found, set [FOUND]=0000H. Jump to Done Mismatch: Move SI to [FOUND] ; If any unequal element is found, send its address to [FOUND] Done

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A heat engine operates between a hot reservoir with a temperature of 400 K and a cold reservoir with a temperature of 300 K. The engine accepts 500 J of energy from the hot reservoir, does 150 J of work, and exhausts 350 J of energy into the cold reservoir. 1) Does this engine violate any laws of thermodynamics? It violates neither the first nor the second law of thermodynamics. It violates the first law of thermodynamics, but not the second. It violates the second law of thermodynamics, but not the first. It violates both the first and second laws of thermodynamics.

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2. If the neurotransmitter released opened a K+ channel, would that lead to an EPSP or an IPSP? Explain your choice. 3. Fluoxetine is a drug that slows the activity of serotonin reuptake transporters. Explain how this will alter levels of serotonin in the synaptic cleft.

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Question 11 (Mandatory) (1 point) An investment of $4000 earns 10.5% interest per year. Determine the amount of the investment after 11 months. a) $4385 b) $4462 c) $42000 d) $3615

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