In lumber that has been pressure treated, a(n) _____ is driven into the wood under pressure
a. line c. stain
b. light d. chemical
ANS: D
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Gillian has developed estimates for strengthening the undercarriage on a medium-use, 70-year-old bridge for which there is no budget to replace the bridge for the next 5 years. Estimates are P = $800,000, S = 0, maintenance cost, M&O = $10,000 per year, n = 5 years. Use a spreadsheet and MARR of 2% per year to do the following:
(a) Determine what the project will cost in PW terms.
(b) During the analysis, Gillian learned that some 25 similar projects had been completed over the last 10 years. With the help of her supervisor, Gillian obtained the information below on the first cost, P, and maintenance cost, M&O, for these projects. Repeat the PW evaluation using expected values for these two estimates. Is PW higher or lower than the value in part (a)?
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(c) Assume the bridge is strengthened and administratively moved to the toll division, which promises a net revenue of $180,000 per year above the M&O cost. Is the project economically justified at the first cost of $800,000? What is the projected response from the driving public to the toll on this 70-year-old bridge?
A group of 50 computer science students were taught introductory computer programming class with an innovative teaching method that used a graphical interface and drag-and-drop methods of creating computer programs. At the end of the class, 43 of these students said that they felt confident in their ability to write computer programs. Another group of 40 students were taught the same material using a standard method. At the end of class, 25 of these students said they felt confident. Assume that each class contained a simple random sample of students. Find a 99% confidence interval for the difference between the proportions of students who felt confident.
What will be an ideal response?
Typically associated with products that are made of structural steel, ____ are used for fabrication and assembly.
A. pictorial assembly B. general assembly C. subassembly D. detail assembly E. none of the above
Compared to other agricultural animals, sheep are docile and easy to handle.
Answer the following statement true (T) or false (F)