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What is the Herfindahl index? firm: 1, 2, 3, 4, 5, 6, market share (%): 40 ,30 ,12 ,20 ,5 ,3

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Question 11 of 20 Fand all the second order partial dorivatives of the given function Mintrat ze poimpigeritics This quebers 1 portelt pesigic \[ f(x, y)=\frac{x}{x+y} \] A. $ \frac{\partial^{2} t}{\partial x^{2}}=-\frac{2 y}{(x+y)^{3}}, \frac{\partial^{2} t}{\partial y^{2}}=\frac{2 x}{(x+y)^{3}}, \frac{\partial^{2} f}{\partial y \partial x}=\frac{\partial^{2} t}{\partial x \partial y}=\frac{y-x}{(x+y)^{3}} $ B. $ \frac{\partial^{2} t}{\partial x^{2}}=-\frac{2 y}{(x+y)^{3}} \cdot \frac{\partial^{2} f}{\partial y^{2}}=\frac{2 x}{(x+y)^{3}} ; \frac{\partial^{2} f}{\partial y \partial x}=\frac{\partial^{2} f}{\partial x \partial y}=\frac{x-y}{(x+y)^{3}} $ C. $ \frac{\partial^{2} f}{\partial x^{2}}=-\frac{y}{(x+y)^{3}} ; \frac{\partial^{2} f}{\partial y^{2}}=\frac{x}{(x+y)^{3}} ; \frac{\partial^{2} f}{\partial y \partial x}=\frac{\partial^{2} f}{\partial x \partial y}=\frac{x-y}{(x+y)^{3}} $ D. $ \frac{\partial^{2} f}{\partial x^{2}}=\frac{2 y}{(x+y)^{3}(x+y)^{3}} ; \frac{\partial^{2} f}{\partial y^{2}}=-\frac{2 x}{(x+y)^{3}} ; \frac{\partial^{2} f}{\partial y \partial x}=\frac{\partial^{2} f}{\partial x \partial y}=\frac{x-y}{(x+y)^{3}} $

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When does allocative efficiency occur? Multiple Choice When the price of the product is equal to its short-run average cost When the price of the product is equal to its long-run average cost When the price of the product is equal to its marginal cost When the price of the product is below its marginal cost. When does allocative efficiency occur? Multiple Choice When the price of the product is equal to its short-run average cost When the price of the product is equal to its long-run average cost When the price of the product is equal to its marginal cost When the price of the product is below its marginal cost

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This problem will guide you through the process of\ncomputing the domain of $\sqrt{\frac{x+1}{x-2} - \frac{x+2}{x+1}}$ • I see some divisions. What $x$-values result in division by zero? • In the final answer to this question you will need to make sure that these are not included. Since the thing under a square root cannot be negative, this problem is asking you to solve $\frac{x+1}{x-2} - \frac{x+2}{x+1} \ge 0$ • Step 1a: Find the solutions to $\frac{x+1}{x-2} - \frac{x+2}{x+1} = 0$. There should be one solution • Step 1b: Find the vertical asymptotes. There should be two of them. • Step 2: Draw these values on a number line. By checking some sample points decide which of the intervals between these endpoints are in the solution. • Put your answer in interval notation. Be careful with endpoints.

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Endocytosis is the inward movement of a large particle into the cell by means of vesicular transport. O True O False

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Question #15 - Find the area of the region bound between the curves below. $r = 2 \cos \theta$ $r = 2 \sin \theta$

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Find the average value of the function $z(x) = 4x \sin(x^2)$ on the interval $[0, \sqrt{\pi}]$. Select the correct answer. 1) $\frac{8}{\pi}$ 2) $\frac{8}{\sqrt{\pi}}$ 3) $\frac{4}{\pi}$ 4) $\frac{4}{\sqrt{\pi}}$ 5) none of these

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3. Suppose relation R(A,B) has the tuples: and the relation S(B,C,D) has tuples: AB 12 34 56 BCD 246 468 479 Compute the natural join of R and S. Then, identify which of the following tuples is in the natural join R >< S. You may assume each tuple has schema (A,B,C,D). a) (1,4,6,8) b) (3,4,7,8) c) (3,4,6,8) d) (1,2,4,8)

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What is the title of the exfiltrated file? Select one: New York City skyline Chicago Cloud Gate Boston Fenway Park San Francisco Golden Gate Bridge

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Which of the below is NOT a type of mold design? Cold Runner 2 Plate Mold Cold Runner 3 Plate Mold Fast Runner Hot Runner Mold Insulated Runner Mold

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regina m.