an escape dune will move a total distance of between 80 and 90 feet in 8 years 0.6319

Intermediate Algebra
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ISBN:9781285195728
Author:Jerome E. Kaufmann, Karen L. Schwitters
Publisher:Jerome E. Kaufmann, Karen L. Schwitters
Chapter1: Basic Concepts And Properties
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Problem 67CR: A crime-scene investigator has 3.4 ounces of a sample. He needs to conduct four tests that each...
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It's true
sand dunes in Colorado rival sand dunes of the Great Sahara Desert! The highest dunes at Great Sand Dunes National Monument can exceed the highest dunes in the Great
-
Sahara, extending over 700 feet in height. However, like all sand dunes, they tend to move around in the wind. This can cause a bit of trouble for temporary structures located near the
"escaping" dunes. Roads, parking lots, campgrounds, small buildings, trees, and other vegetation are destroyed when a sand dune moves in and takes over. Such dunes are called
"escape dunes" in the sense that they move out of the main body of sand dunes and, by the force of nature (prevailing winds), take over whatever space they choose to occupy. In most
cases, dune movement does not occur quickly. An escape dune can take years to relocate itself. Just how fast does an escape dune move? Let x be a random variable representing
movement (in feet per year) of such sand dunes (measured from the crest of the dune). Let us assume that x has a normal distribution with u = 12 feet per year and o = 3.9 feet per
year.
Under the influence of prevailing wind patterns, what is the probability of each of the following? (Round your answers to four decimal places.)
USE SALT
(a) an escape dune will move a total distance of more than 90 feet in 8 years
0.7054
(b) an escape dune will move a total distance of less than 80 feet in 8 years
0.0735
(c) an escape dune will move a total distance of between 80 and 90 feet in 8 years
0.6319
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Transcribed Image Text:It's true sand dunes in Colorado rival sand dunes of the Great Sahara Desert! The highest dunes at Great Sand Dunes National Monument can exceed the highest dunes in the Great - Sahara, extending over 700 feet in height. However, like all sand dunes, they tend to move around in the wind. This can cause a bit of trouble for temporary structures located near the "escaping" dunes. Roads, parking lots, campgrounds, small buildings, trees, and other vegetation are destroyed when a sand dune moves in and takes over. Such dunes are called "escape dunes" in the sense that they move out of the main body of sand dunes and, by the force of nature (prevailing winds), take over whatever space they choose to occupy. In most cases, dune movement does not occur quickly. An escape dune can take years to relocate itself. Just how fast does an escape dune move? Let x be a random variable representing movement (in feet per year) of such sand dunes (measured from the crest of the dune). Let us assume that x has a normal distribution with u = 12 feet per year and o = 3.9 feet per year. Under the influence of prevailing wind patterns, what is the probability of each of the following? (Round your answers to four decimal places.) USE SALT (a) an escape dune will move a total distance of more than 90 feet in 8 years 0.7054 (b) an escape dune will move a total distance of less than 80 feet in 8 years 0.0735 (c) an escape dune will move a total distance of between 80 and 90 feet in 8 years 0.6319 Need Help? Read It 5:57 PM 11/11/2020 o 日e Type here to search
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