In a copper mining company, cleaning work is being carried out in the grinding area, so the industrial cleaning personnel proceed to carry out this task and then moisten the floor to avoid suspended particles. The water used for this purpose (ρwater = 1000 kg/m³) is flowed through a 4 in (10.16 cm) diameter hose, at a temperature of 15 °C. In order to improve cleaning efficiency, a laminar flow is generated, changing the hose outlet area, thereby reducing the water velocity to 50% of its inlet velocity (vi = 10 m/ s). Next, answer the following: 1. Determine the outlet diameter of the pipe. 2. A copper metal piece is being made for the maintenance of the facilities. The required length of the copper piece is 2 m, all at room temperature (23 °C). What is the length of the copper when the temperature is decreased to 15 °C? Consider that the linear thermal expansion (α) of copper is 16.7 x 10-6 °C-1.

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general 11 months ago 1037

The Dunder Mifflin Company has current assets of $228,440, total assets of $620,160, current liabilities of $159,460, and long-term liabilities of $249,920 . The firm has 96,300 shares of common stock outstanding. Compute the firm's book value per share (that is, book value of equity divided by number of shares of common stock outstanding). Record your answer rounded to the nearest cent. Do not include a dollar sign or commas in your answer. For example, record $10.248976 as 10.25.

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general 11 months ago 572

The year-end 2021 balance sheet for Tom's Copy, Inc. lists common stock ($1.00 par value) of $18,260, capital surplus of $27,940 and retained earnings of $57,640 . On the 2020 year-end balance sheet, retained earnings are listed as $50,480 . The firm's net income in 2021 was $25,000 . No stock was issued or repurchased in 2021. What were total dividends paid by the firm in 2021? Record your answer rounded to the nearest dollar. Do not include a dollar sign or commas in your answer. For example, record $1,234,567.89 as 1234568.

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general 11 months ago 1012

One of the products of a company is flour in 1000 gr packages. The weights of these packages actually follow a normal distribution with a known standard deviation, equal to 35 grams. On a certain day, a simple random sample of 125 containers has been selected, and its average weight has been measured to be 985 grams: [Value: 4 pts.] a) Calculate a 95.5% confidence interval for the average weight of the packages packed on the day. b) What would the previous confidence interval be if the confidence level were set at 99.7%? c) What is the probability that a package weighs less than 930 gr. ? d) What is the probability that a package weighs between 970 gr. and 1030 gr. ? e) What is the probability that a package weighs 1000 gr. ? f) What is the probability that a package weighs more than 1000 gr. ? g) How many packages weigh less than or equal to 980 grams? h) How many packages weigh between 985 and 1015 grams? i) How many packages weigh between 990 and 1020 grams? j) How many packages weigh more than 1000 grams?

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general 11 months ago 2814

A midsize mobile carrier keeps records of complaints received from its customers. Complaints for last month are listed in the following table. What percent of the complaints are due to the category Poor coverage? Round your answer to two decimal places, if necessary. Customer Complaints Type of Complaint Frequency Poor coverage 118 Too expensive 99 Extra data usage charges 87 Long customer service wait times 92 Poor tech support 106 Incorrect billing 89 Insurance doesn't cover loss/theft 43 Frequently drops calls 156

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general 11 months ago 355

A student in the AI course creates an alert system to detect possible late clients in credit operations. A bank does intensive testing of the system based on the records of its customer portfolio and determines that if the person is late, the system is correct in classifying them as such 95% of the time and that if the person is punctual, the system fails. by classifying her as unpunctual 3% of the time. Bank records reveal that 10% of customers default, while 90% do not. If a customer, selected at random, is classified as late by the system, what is the probability that he or she really is?

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general 11 months ago 1717