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1 2 3 4 Winnie is buying dog food for her dog. She needs 10 pounds of food each week, but has room to store any extra food that she purchases. The food comes in 4 different sizes as given below: 4.2 pounds for $ \$ 4.99 $ 8.5 pounds for $ \$ 9.27 $ 12 pounds for $ \$ 11.04 $ 20 pounds for $ \$ 18.99 $ Winnie is trying to be a smart shopper and get the best deal on the dog food. Which size bag of dog food should Winnie buy? a. Winnie should buy the 4.2 pound bags. b. Winnie should buy the 8.5 pound bags. c. Winnie should buy the 12 pound bags. d. Winnie should buy the 20 pound bags. Please select the best answer from the choices provided A Mark this and return Save and Exit

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Compared to point B, the coaster at point D has three times the speed. How much greater is the kinetic energy of the coaster at point D compared to point B? Is your result consistent with the difference in height that you observed in the two cases?

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13. In regards to total surplus, which statement is true? a. There is always too little entry in monopolistic competition, due to barriers to entry. *b. There is always too little entry in monopolistic competition due to the product variety effect. c. There is always too little entry in a monopolistically competitive industry due to the business- stealing effect. d. There is always too much entry in a monopolistically competitive industry, as in the long run firm produce more than the quantity that will minimise average total costs of production. e. None of the above.

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You have a 0.560 g sample of a radioactive isotope. After 4 sec you have 0.196 g. How much radioactive material will you have after an additional 16.0 sec (total decay time of 20 sec)?

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Try $f(x) = \frac{2x+3}{x^2+5}$, eq of tangent line at $x=1$

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3. Compute the inverse Laplace transform of \begin{align*} F(s) &= \frac{1}{s^4} + \frac{3s}{s^2 + 9} \\ F(s) &= \frac{7}{s} + \frac{6}{s + 4} - \frac{5}{s^2 + 16} \\ F(s) &= \frac{1}{(s - 2)(s + 1)(s - 3)} \\ F(s) &= \frac{s + 2}{s^2(s + 1)} \\ F(s) &= \frac{s + 1}{s(s^2 + 1)} \\ F(s) &= \frac{s^2 + 2s + 4}{(s + 1)(s^2 + 4)^2} \end{align*}

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4.22 As shown in Fig. P4.22, a jet of water of diameter, ejected vertically upward, strikes a circular plate of diameter, and spreads out at a uniform velocity in all directions. Find the relational expression between H and the speed V of the water jet. However, ignore all friction and consider $H \approx h$ if necessary.

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2. Suppose $x(t) = \left| \text{sinc} \left( \frac{t}{2} \right) \cos(10t) + 3 \cos(10t) \right|$ is input to a filter whose frequency response is $H(\omega) = \text{rect}(\omega)$. \newline Find the output $y(t)$. Show all your work. Hint: $\left| \cos(10t) \right| = \frac{2}{\pi} + \sum_{n=1}^{\infty} \frac{1}{\pi} \frac{(-1)^n}{n^2 - \frac{1}{4}} \cos(20nt)$.

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2.4 A flow rate of Q=16 L/min pump is installed below the fluid surface, as shown below. The hydraulic oil has $\rho=917$ kg/m$^3$, the hydraulic oil kinematic viscosity $\nu=11$ mm$^2$/s, the pipe diameter $d=18$mm. Neglecting the pump leakage and local pressure loss, and assuming the hydraulic oil surface as relatively unchanged (the reservoir capacity is relatively large) calculate the pump inlet absolute pressure.

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2) A- Which of the following tool types can be used during the dynamic tests execution phase? Answer: Test data preparation tool Coverage measurement tool Configuration management tool Modeling tool None of them B- You are testing a Customer Relationship Management (CRM) system and you have prepared the following test cases: TC1: Precondition: CRM database contains at least two client records. Steps: Clear the whole CRM client database by removing all records. Expected result: The database is empty. TC2: Precondition: No preconditions. Steps: Create a new client record that does not exist in the database. Expected result: Record correctly added in the database. TC3: Precondition: Database contains at least one client record. Steps: Try to create a new client record that is already present in the database. Expected result: System does not allow to duplicate the record. At the beginning, the CRM database is empty. The execution of each test lasts 5 minutes. You want to execute all three test cases, but in the shortest possible time. What is the reasonable test execution schedule in this situation? Answer: TC2, TC3, TC1 TC2, TC2, TC3, TC1 TC2, TC2, TC1, TC2, TC3 TC2, TC1, TC3 None of them C- Every fifth shopping an order processing system assigns a discount for a customer. You want to use the equivalence partitioning technique to check if this rule holds. Which of the following is a minimal set of values representing the number of the shopping that covers all valid equivalence classes for this problem? Answer: 0, 1, 5 55, 89 1, 5, 6 5, 10, 15, 20, 25, 30, 35, ... None of them D- What is the difference between static and dynamic techniques, with respect to their objectives? Answer: Static techniques directly detect defects, while dynamic techniques directly detect failures. Static techniques are usually applied at the early SDLC phases, while dynamic techniques at the later phases. There is no difference, because they both try to detect defects as early as possible. Static techniques require programming skills, while dynamic techniques don't. None of them

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jaime c.