Example 3The sales tax in a town is 9.4%. How much tax will you pay on a $140 purchase?Example 4In the news, you hear "tuition is expected to increase by 7% next year." If tuition this year was$1200 per quarter, what will it be next year? (Find the answer in two ways.)

The first part of the question is asking for the amount of sales tax you would pay on a $140…

Answered: Example 3 The sales tax in a town is…

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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Part of a test given to young children consists of putting together a simple jigsaw puzzle. Suppose that such a puzzle is given to 2000 children, each child is timed, and a graph of the times is made. Suppose that the graph is a normal curve with a mean time of 122 sec and a standard deviation of 16 sec. (a) About how many of the children finished the puzzle in less than 90 sec? children(b) How many took more than 154 sec? children(c) If you rated as "average" all the children within 1 standard deviation from the mean, how many children would fall into this classification? children
2
3. A youth group has a yard sale to raise money for charity. The group earns $1200 but decides to invest the money in the bank. Their bank pays an interest rate of 6% that compounds QUARTERLY. A. How much money will they have in 60 months? colisutie airi lebem of MOIOMUJATAJMO na W A How long will it take for their money to triple? Round your answer in MONTHS.
A loan shark lends you $100 at 1% compound interest per week (this is a weekly, not an annual rate). (Round your answers to the nearest dollar.) How much will you owe after 2 years? (Use 52 weeks per year.) In "street" language, the profit on such a loan is known as the "vigorish" or the "vig." Find the shark's vig.
Question 23 During a month's time, an automobile salesperson receives a 6% commission on the first $5000 in sales, a 7% commission on the next $5000 sales, 8% commission on anything over $10,000. What is her commission for $36000 in sales?
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Example 3 The sales tax in a town is 9.4%. How much tax will you pay on a $140 purchase? Example 4 In the news, you hear "tuition is expected to increase by 7% next year." If tuition this year was $1200 per quarter, what will it be next year? (Find the answer in two ways.)