Gchoose the correct statement: select one: a. investment casting is an ideal process for forming metals that can be successfully machined. b. in die casting, a fine refractory powder is used to cover the die to prevent metals from cooling prematurely, stops it sticking to the die and lessens metal oxidation on die surface. c. investment casting is suitable to make small numbers of specialized casting with high precision, good surface finish, made of low melting temperature metals. d. die casting is useful to make large number of small, light, high precision parts with good surface finish made of high melting temperature metals.

Side bar toggle icon performance in last 10 qs hard easy performance in last 10 questions - there are '3' correct answers, '3' wrong answers, '0' skipped answers, '1' partially correct answers about this question question difficulty difficulty 60% 42.2% students got it correct study this topic • demonstrate an understanding of sampling distributions question number q 3.8: choose the correct estimate for the standard error using the 95% rule.

Consider the local telephone company, a natural monopoly. the following graph shows the monthly demand curve for phone services and the company’s marginal revenue (mr), marginal cost (mc), and average total cost (atc) curves. 0 2 4 6 8 10 12 14 16 18 20 100 90 80 70 60 50 40 30 20 10 0 price (dollars per subscription) quantity (thousands of subscriptions) d mr mc atc 8, 60 suppose that the government has decided not to regulate this industry, and the firm is free to maximize profits, without constraints. complete the first row of the following table. pricing mechanism short run long-run decision quantity price profit (subscriptions) (dollars per subscription) profit maximization marginal-cost pricing average-cost pricing suppose that the government forces the monopolist to set the price equal to marginal cost. complete the second row of the previous table. suppose that the government forces the monopolist to set the price equal to average total cost. complete the third row of the previous table. under average-cost pricing, the government will raise the price of output whenever a firm’s costs increase, and lower the price whenever a firm’s costs decrease. over time, under the average-cost pricing policy, what will the local telephone company most likely do

How do the percentages of the 65 customer satisfaction ratings in that actually fall into the intervals [formula62.mml ± s], [formula62.mml ± 2s], and [formula62.mml ± 3s] compare to those given by the empirical rule? do these comparisons indicate that the statistical inferences you made in parts b and c are reasonably valid? (round your answers to the nearest whole number. omit the "%" sign in your