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Get solution: Solve the following word problems for the unknown. Round decimals to

Contemporary Mathematics | 6th Edition | ISBN: 9780538481267 | Authors: Robert Brechner ISBN: 9780538481267 378

Solution for problem 35 Chapter 6

Contemporary Mathematics | 6th Edition

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Contemporary Mathematics | 6th Edition | ISBN: 9780538481267 | Authors: Robert Brechner

Contemporary Mathematics | 6th Edition

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Problem 35

Solve the following word problems for the unknown. Round decimals to hundredths and p ercents to the nearest tenth when necessary. Last year Keystones corporate jet required $23,040 in maintenance and repairs. a. If this represents 32% of the total operating costs of the airplane, what was the total cost to fly the plane for the year?b. If the plane flew 300,000 miles last year, what is the cost per mile to operate the plane?c. Sky King Leasing offered a deal whereby it would operate the plane for Keystone for only $0.18 per mile. What is the percent decrease in operating expense per mile being offered by Sky King?d. In 2009, the company began looking to buy another jet. Use the chart More Jets for Sale to calculate the rate of increase of jets available in 2009 compared with 1999. Round to the nearest whole percent.

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Statistics 1100 Week 1 01/27/2016 ▯ Stem-and-Leaf Display ▯ Histogram for exam data (C2, Exam Scores)  How many classes to use o <50 observations 5-10 classes  ex: sample size: 25 (n)  #classes 5-10  What is the range o Largest observation – smallest observation = range  88.40-21.10 but DON’T WANT DECIMALS  90 – 20 = 70 (good whole number)  Width of class interval o Range/ number of classes = class width  70 / 7 = 10  Class frequency o # of observations in class ▯ ▯ Histogram (Frequency/ # of observations) with 7 classes  Range = 90- 20= 70  Width= 10  Classes= 7 o No gaps in histogram like bar chart!! ▯ ▯ Shapes of Histogram  Symmetrical  Positively skewed  Negatively skewed  Bell-shaped ▯ ▯ Relative Frequency Hisogram with 7 classes  Class relative frequency= class frequency/sample size o Class frequency =1 sample size= 25 o 1/25= .04 (relative frequency) ▯ ▯ Histogram with 5 classes  40/5 = 14 class width  ▯ Histogram with 6 classes  20-92 o range 72 o 72/6= 12 class width ▯ ▯ Stem and Leaf Display  2 | 1

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Chapter 6, Problem 35 is Solved
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Textbook: Contemporary Mathematics
Edition: 6
Author: Robert Brechner
ISBN: 9780538481267

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