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APES: Unit 6 - Modules 34-40

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algebra

Ruth Loeb is a clerk at Violet’s Dress Shoppe. She works 8 hours each day. A time study recorded her activities. What percent of the 8 hours does Ruth spend on each activity? $$ \begin{array}{|l c|} \hline \textbf{Activity} & \textbf{Hours}\\ \text{Assisting customers} & 4.2\\ \text{Processing sales} & 1.1\\ \text{Restocking racks} & 0.9\\ \text{Pricing merchandise} & 0.8\\ \text{Break and miscellaneous} & \underline{1.0}\\ \text{Total} & 8.0 \\ \hline \end{array} $$

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economics

Let's look at someone's requests for money over the course of four days. Assume that prior to the invention of ATMs and credit cards, this person made one trip to the bank at the start of each four-day period to withdraw all the funds she would require. Let's say she requires $4 each day. Finally, since credit cards have been invented, this individual uses her card to pay for all of her purchases. She waits to withdraw cash until the fourth day, when she takes out the full sum required to cover her credit card transactions from the previous four days. Recompute your answer to part (a).

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economics

In Exercises $38$ through $45$ , evaluate the double integral. You may need to exchange the order of integration. $$ \int_0^2 \int_{-1}^1 \frac{6 x y^2}{x^2+1} d y d x $$

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question

In September, demand for industrial furnace boilers at a large plumbing supply warehouse has a mean of 7 boilers with a standard deviation of 2 boilers. The warehouse pays a unit cost of $2,225 per boiler plus a fee of$500 per month to act as dealer for these boilers. Boilers are sold for $2,850 each. (a) Find the mean and standard deviation of September profit (revenue minus cost). (b) Which rules did you use?

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