11th Edition

ISBN: 9780134758817

Author: SAUNDERS

Publisher: PEARSON CO

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The word “unitary” comes from the word “unit”, which means a single and complete entity. In this method, we find the value of a unit product from the given number of products, and then we solve for the other number of products.

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The amount earned or lost on the sale of one or more items is referred to as the profit or loss on that item.

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Textbook Question

Chapter 12, Problem 5FPS

Police Science To determine the speed that a vehicle was traveling at the time of an accident, police officers carefully measure the lengths of the skid marks left at the scene. There are many factors that determine the skid length, and a quick and simple formula for determining the speed is S = 30 ⋅ L ⋅ d ⋅ e , where S is the speed in miles per hour, L is the skid length in feet, d is the drag factor, and e is the braking efficiency. The following table shows the skid lengths for ten accidents that occurred on a particular stretch of an interstate during icy conditions this past winter:

Chapter 12, Problem 5FPS, Police Science To determine the speed that a vehicle was traveling at the time of an accident,

(a) Use the given formula, with d = 0.2 (icy road) and e = 1.0, to calculate the speeds for the given skid lengths and complete the table. (Round to the nearest whole number.)
(b) Find the median speed.
(c) Find the mean speed.
(d) Find the range of the speeds.
(e) Find the standard deviation of the speeds.

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Chapter 12, Problem 4FPS

Chapter 12, Problem 6FPS

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Solution Summary: The author explains the speed formula for skid lengths for ten accidents that occurred on a particular stretch of an interstate during icy conditions this past winter.

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