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Advanced Engineering Mathematics

10th Edition

ISBN:9780470458365

Author:Erwin Kreyszig

Publisher:Erwin Kreyszig

Chapter2: Second-order Linear Odes

Section: Chapter Questions

Problem 1RQ

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Lucy has recently signed up for a membership at the local gym. She enjoys using thế gyms strength and cardio equipment, but she is also interested in the classes the gym offers, such as aerobics, yoga, and kick boxing. However, the classes are not included in Lucy's regular membership. She has the option of paying $2.50 for each class she takes. Another option is to upgrade her membership and take an unlimited number of classes for an extra $15 each month. How many classes would she need to take each month to make the $15 per month upgrade plan the less expensive option?
The buyer for Payless Shoe store decided to order a woman's shoe at a buyers' meeting in Miami. The shoe will be part of the company's Christmas promotion. New designs are coming out after Christmas, so the shoes have to be sold during the Christmas season. Payless plans to hold a special December clearance sale, in an attempt to sell all shoes not sold by November 31st. The shoes will retail at $50 per pair and the company makes a profit of $15 on each pair. At the sale price of $21 per pair, all surplus shoes can be expected to sell during the December sale. The expected demand for the shoes is 700 pairs with a standard deviation of 300 pairs. How many pairs of the shoe should the buyer order?
Suppose you make beautiful coffee tables out of juniper trees. Your materials cost for each table is $135. You pay your craftsman $25 per hour and it takes him 5 hours to complete one table. If you sell these tables for $689, What is the Gross Profit Margin on the coffee tables

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