Numerade

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The mean annual incomes of aircraft mechanics are normally distributed with the mean of $40,000 and a standard deviation of $2,000. A local union representative wishes to find out whether their members earn more or less than $40,000 annually. If the level of significance is 0.05 and σ is known, what is/are the critical value(s) for a 2-tail test? A. 1.28 B. ±1.64 C. ±1.96 D. 2.58 E. -1.96

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Organisms with a multicellular diploid stage and a unicellular haploid stage exhibit what type of meiosis? O gametic O dimorphic O zygotic O sporic O dikaryotic

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Price of X P1 P2 P3 Q1 Q2 Q3 Q4 Q5 Quantity of X Supply Time left 0:18:50 Demand FIGURE 3-3 Refer to Figure 3-3. At à price of P3 there is excess for the price to Select one: A. demand; rise B. supply; rise C. supply; fall D. demand; fall in the market for X and pressure

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Use the chain rule to find the derivative of f(x) =8\sqrt{5x^6+7x^3} Type your answer without fractional or negative exponents. f'(x) =

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Reduce the following representation into its irreducible components: D3h E 2C3 3C2 Oh 2S3 30v r 6 3 2 4 1 4

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Given the class outline below which includes a destructor, write (in C++) a default constructor that ensures: (1) no memory leaks and (2) nothing is double deleted (or improperly deleted in any other way). class ruhroh { private: string **w; string *x; int* arr [100]; public: ~ruhroh(); }; ruhroh::~ruhroh() { for(int i=0; i < size; i++) { if (arr[i] != NULL) { delete arr[i]; } } delete *w; }

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According to Harold Miner, the Nacirema believes that there is a connection between the mouth and morality. (LO 3.4) True False

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14. The supporting structure of a movable 1 ton crane has the dimensions as shown in Fig. 4-15. Determine the following: (a) location of the maximum compressive stress. (b) location of the maximum shear stress, (c) bending moment at section A-A, (d) direct compressive load at section A-A, (e) maximum compressive stress, f) maximum shear stress. Ans. (a) point P on section A-A. (b) point P on section A-A, (c) 71,000 in-lb. (d) 2000 lb. (e) 4800 ps1, (f) 2400 ps1

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2. Using generating function, solve the recurrence relation $a_n - a_{n-1} = n$; $n \ge 1$ with $a_0 = 0$.

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(7) The power transmission component shown is under impact torsional loading. a) Calculate the design shear stress for repeated loading if the shaft is made from 6061 T4 Aluminum. b) Find the stress concentration factor ($k_t$) at the step and the hole. c) Determine the maximum impact torque (in $N \cdot m$) that could be safely applied to the shaft d) Determine the angle of twist in degrees if the length of the Ø 20 mm section is 800 mm and the length of the Ø 30 mm section is 720 mm, and the torque from part c) is applied

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nicholas v.