Which regex pattern would match “color” and “colour” (with optional ‘u’)?

What is the primary goal of tokenization in the context of text analysis?

An analyst using the inventory turnover ratio to calculate future levels of inventory may face the problem that:

What does the groupby() method do in the line: comp.groupby().shift(-1)

What condition is necessary to interpret Y ∼ X + e as “X causes Y”? 

Ramos CompanyRamos Company included the following information in its annual report:​201120102009Sales$178,400$162,500$155,500Cost of goods sold115,000102,500100,000Operating expenses50,00050,00045,000Net income13,40010,00010,500  Refer to the information for Ramos Company. In a common size income statement for 2011, the operating expenses are expressed as:

Assets for a particular business might include:

Which of the following are better indicated by percentage change statements than common-size statements?

To ensure that the financial statements articulate, it is important that the change in the cash balance on the balance sheet each year agrees with:

Preston pushes a wheelbarrow weighing 500 N to the top of a 50.0-m ramp, inclined at 20.0° with the horizontal, and leaves it. Tamara accidentally bumps the wheelbarrow. It slides back down the ramp, during which an 80.0-N frictional force acts on it over the 50.0 m. What is the wheelbarrow’s kinetic energy at the bottom at of the ramp? (g = 9.8 m/s2)