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kathryn cobos

kathryn c.

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Consider the beam and loading shown. Given: $P = 9.8$ kN 0.3 m 1.5 m 40 mm 12 mm 150 mm 12 mm 100 mm 200 mm Determine the shearing stress at point a. (Round the final answer to the nearest whole number.) The shearing stress at point a is ________ kPa.

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Evaluate $\int \sin^4 x \, dx$. Select one: a. $\frac{3}{8}x - \frac{1}{4}\sin(2x) + \frac{1}{32}\sin(4x) + C$ b. $\frac{3}{8}x + \frac{1}{4}\sin(2x) - \frac{1}{32}\sin(4x) + C$ c. $\frac{3}{2}x + \sin(2x) - \frac{1}{8}\sin(4x) + C$ d. $\frac{3}{8}x - \frac{7}{32}\sin(2x) + C$

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HBr What is the configuration of the product(s) formed. Select all that apply. R S R,R S,S R,S S,R Meso (thus R,S and S,R are the same)

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It is required to drive a machine at 30 rpm by a motor running at 1500 rpm. Design a gearbox (gearset) to achieve this speed, keeping the reduction ratio for any given stage below 8. Show a layout of the gears with the numbers of teeth next to each gear. Direction of rotation is immaterial. Motor Ground Gearbox 1500 rpm 30 rpm Driven machine

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1. Hot Dogs in Yankee Stadium There is only one hot dog vendor at Yankee Stadium. The vendor always prices hot dogs in multiples of 25 cents (e.g., $0.50, $2.75, $5.50, etc.) in order for his staff to be able to make exact change easily. During a sold-out Red Sox-Yankees game, the vendor knows from long experience the demand curve for hot dogs, which is given in the table on the right. (Electronic versions of tables are posted on Canvas.) (a) The vendor's marginal cost of cooking, fixing and providing a hot dog is $1.50. What price should the vendor charge and how many hot dogs would you expect the vendor to sell? Hot Dog Stadium Hot Dog Price Sales $8.00 500 $7.00 2,000 $6.50 4,500 $6.00 7,000 $5.50 9,000 $5.00 12,000 $4.50 15,250 $4.25 17,500 $4.00 20,500 $3.75 23,750 $3.50 27,500 $3.25 32,000 $3.00 36,000 $2.75 41,000 $2.50 45,500 $2.25 51,000 $2.00 57,000 $1.75 62,000 $1.50 67,000 $1.25 69,000 $1.00 71,000 $0.75 74,000 $0.50 77,000 Bleacher Grandstand Hot Dog Hot Dog Hot Dog Price Sales Sales $8.00 500 $7.00 2,000 $6.50 4,500 $6.00 7,000 $5.50 9,000 $5.00 12,000 $4.50 15,250 $4.25 200 17,300 $4.00 1,000 19,500 $3.75 1,500 22,250 $3.50 2,200 25,500 $3.25 3,000 29,000 $3.00 4,400 31,600 $2.75 6,500 34,500 $2.50 9,000 36,500 $2.25 12,500 38,500 $2.00 14,750 42,250 $1.75 18,000 44,000 $1.50 20,000 47,000 $1.25 21,000 48,000 $1.00 22,000 49,000 $0.75 23,500 50,500 $0.50 25,000 52,000 (b) The vendor notices that one feature of Yankee Stadium is that the bleachers and the grandstand seats have separate entrances, so fans cannot sneak from one section to another. The demand curves for hot dogs in the two sections are given in the table to the left. Should the vendor choose different prices (and sales targets) for each set of spectators? Explain what prices the vendor should set and why. (c) Just hours before the game, the vendor's main kitchen experiences a major electrical problem, shutting down the majority of its cooking facilities. The unit cost of $1.50 per hot dog remains unchanged, but hot dog production capacity is reduced to only 8,000 units. Suppose that the vendor has the freedom to change prices in light of the production constraint in order to maximize profits from this game's sales and that, as in part (b), the vendor can sell hot dogs for different prices in the bleachers and grandstand. What prices should the vendor set for bleacher and grandstand hotdogs, and how many hot dogs do you expect the vender to sell in each location? Why?

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When a new team enters a league, the effect on nearby teams is to: Shift their demand curve to the left. Shift their demand curve to the right. Increase their marginal costs. Decrease their marginal costs.

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Is one of the 10 principles of economics that a country standard of living depends on its ability to produce goods and services?

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At the beginning of 2000, Keegan's house was worth 222 thousand dollars and Nick's house was worth 130 thousand dollars. At the beginning of 2003, Keegan's house was worth 184 thousand dollars and Nick's house was worth 156 thousand dollars. Assume that the values of both houses vary at exponential rates. a. Write a function \(f\) that determines the value of Keegan's house (in thousands of dollars) in terms of the number of years \(t\) since the beginning of 2000. \(f(t) = \) b. Write a function \(g\) that determines the value of Nick's house (in thousands of dollars) in terms of the number of years \(t\) since the beginning of 2000. \(g(t) = 130(1.062658569)^t\) c. How many years after the beginning of 2000 will Keegan's and Nick's houses have the same value?

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The count in a bacteria culture was initially 100, and after 30 minutes the population had increased to 1800. When will the population reach 11000? Round to two decimal places.

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What genomic trait do chloroplasts share with mitochondria? They both arose from archaea before an ancestral endosymbiosis event They always have at least 4 membranes in the host cell They are free-living when host cells die They have their own genomes

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