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Natural selection may have favored single births in so many primates because we evolved as tree-dwellers and could not effectively hold and protect more than one offspring. Select one: O True O False

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What does contribution margin represent? Question 18 options: A) The sum of cost of goods sold and variable expenses B) What remains from total sales after deducting cost of goods sold C) What remains from total sales after deducting fixed expenses D) What remains from total sales after deducting all variable expenses

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Each document in the collection contains the following fields: • The \_id field holds the zip code as a string. • The city field holds the city name. A city can have more than one zip code associated with it as different sections of the city can each have a different zip code. • The loc field holds the location as a latitude longitude pair. • The pop field holds the population. • The state field holds the two letter state abbreviation. Write queries for the following problems. 1. Find all the zip codes with population between 80000 and 85000 (List the \_id field and the pop field, and order the zip codes by their population in an ascending order). (2 Points) 2. Find all the zip codes in the \"WI\" state with population less than 100 or greater than 50000 (List the \_id field, the pop field and the state field, and order the zip codes by their population in a descending order). (2 Points) 3. Count the number of zip codes in the \"IN\" state. (2 Points) 4. Find all the states that have a city called DALLAS (Hint: please use the distinct operation). (2 Points) 5. Find the population of each city in the \"RI\" state (Hint: please use the aggregate operation). (2 points)

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The nuclide 14C is produced by nuclear reactions of cosmic rays in the atmosphere. 14C is unstable and undergoes ?-decay to 14N with a mean life of 8270 years. Each gram of carbon newly extracted from the atmosphere has an activity of 920 Bq. What is the abundance of 14C in the carbon?

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2. R?=200? 10V R?=300? R?=500? R?=200? a. Rtotal = ? b. I? = A c. I? = A d. I? = A e. I? = A f. Itotal = A g. V? = V h. V? = V i. V? = V j. V? = V

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PART 2: Multiple choice questions (5) 21. The peritoneum-derived structures in following are : A. Tenia coli B. mosoappendix C. less omentum D. falciform ligament E. inguinal ligament 22. The reritoneal cavity is A. obturated B. obturated in male C. obturated in female D. opened in female E. opened in male 23. the boundaries of the omental foramen are formed by: A. right free margin of lesser omental anteriorly. B. hepatic portal vein posteriorly C. caudate lobe of liver superior D. proximal part of duodenum inferiorly E. inferior vena cave posteriorly 24. the root of the mesentery crosses: A. third part of the duodenum B. abdominal aorta and inferior vena cava C. right psoas major M. D. right ureter E. right gonadal vessels 25. The progressive changes from jejunum to ileum A. the wall becomes thinner B. the wall becomes thicker C. the number of the circular folds decreases D. the number of the circular folds increases

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The transfer function is given as follow: $G(s) = \frac{K}{s(s+5)(s+11)}$ Design Requirement: i) $%.05 \leq 15%$ ii) $T_P \leq 0.5 sec$ iii) $K_V \geq 119.25$

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2 Look at the shapes on the grid below. Each square on the grid is 1 cm$^2$. Work out which shape has the greater area. Write this area in the answer box below. A B cm$^2$

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6) (10) Soft drink stand problem. Ocean A W B X C Y D Z E Beach Assume the following: Soft drink stands are located at points B and D along a beach of length AE. In equilibrium beachgoers to the left of C will buy from stand B while beachgoers to the right of C will buy from stand D. The distance between points A and B is W. The distance between points B and C is X. The distance between points C and D is Y. The distance between points D and E is Z. Suppose that beachgoers are located uniformly along the beach one at each unit of distance and that each beachgoer buys one soft drink per period. The cost of producing soft drinks is zero but the cost to the beachgoers of carrying the soft drink back to their location is 1 cent per each unit of distance walked (because the soft drink gets warm). Assume that the beach is 100 meters long (AE = 100 meters) and that distance W is 40 meters and distance Z is 10 meters. If the objective is to maximize profit, what price should stand B charge and what price should stand D charge?

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Let X be a discrete random variable whose PMF is $\qquad p(0) = \frac{2\theta}{3}, \quad p(1) = \frac{\theta}{3}, \quad p(2) = \frac{2(1-\theta)}{3}, \quad p(3) = \frac{1-\theta}{3}$. Suppose that $X_1, \dots, X_n$ are iid samples of X ($n > 0)$. (a) Find the MME for $\theta$. [10 marks] (b) Is the MME unbiased? Is it asymptotically unbiased? [10 marks] (c) Find the MLE for $\theta$. [10 marks] (d) Is the MLE unbiased? Is it asymptotically unbiased? [10 marks]

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alexis m.