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Banking can be a real world problem if banking isn't used wisely. For instance you have money compounded annually, and you have to figure out how much your interest is and your years. You have to use a logarithm to figure out the accumulate price in amount of y years of how much money you would have invested.

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Logarithms are used all the time in the richter scale for earthquake magnitudes. Everything from 10 = 1, 100=2, 1000 = 3, every time a 0 is added the number rises, which makes the magnitude rise. So the logs help minimize the scale in order to calculate how the magnitude affect is. It is more easier too than to use the logarithm then to use the actual number because it is too long. This is a big help for scientists.

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Logarithms are a help to determining the population of place. They are help to use determine the slow growth of a community. Population growth is also very need since there are about 7 billion people, logs help minimize the calculation by like half and determining how many there are. The equation of finding the population is n ( t ) = n ₀ e rt

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Logarithms are used a ton in the ejecting volume of volcanos. They are used to classify the ranges of the volcano. The log scale is used from VEI 2 to VEI 8 which is the eruption scale. Every 1 time the VEI scale rises, that eruption is 10,000 times worse than before.

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The economy is very vital to our everyday life. The price changes and economics come together known as the economic price scale. This is used in economics which when a dollar is increased the economic price goes up higher and then there is less percent of change bc of the less capacity/effect it has in the market. Logarithms also can only be used when the data is only positive. They are also almost equal to percentage changes. Also used in banking.

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Logs aren't used much in animal organ measurement but helps with the measuring of the weight of an organ. I believe they also used logs to determine the metabolism of the organ. Also logs are used in allometry which is the sizing of the organs.

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pH scales are used everyday which are used along with logs in science. Logs are in science for the pH scale because there are so many wide hydrogen ions that are hard to count. There are 100,000,000, but because of log there is 1-14. Every 1 on the a log scale is actually a factor of 10. That is how easily the pH scale is bc of logs.

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Smith, Sanderson. Agnesi to Zeno. Key Curriculum Pr, 1996. Print. USA., Macmillan. Mathematics and Computer Wizards. Macmillan Reference USA, 2000. Print.

O'Connor, J.J., and E.F Robertson. "An overview of the history of mathematics." MacTutor History of Mathematics Archive. St. Andrews University, Feb 1997. Web. 15 Jun 2010. <http://www-history.mcs.standrews.ac.uk/HistTopics/History_overview.html>.

"Logarithms." Real-Life Math: Everyday Use of Mathematical Concepts. Evan M. Glazer and John W. McConnell. Westport, CT: Greenwood Press, 2002. 55-58. Gale Virtual Reference Library. Web. 15 June 2010.

http://www.phs.d211.org/science/smithcw/Chemistry%20332/Quarter%204%20Unit%202/3%20pH%20scale.pdf

http://www.algebra.com/algebra/homework/logarithm/logarithm.faq.question.703916.html

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pH Scales, size of animal organs, price changes in economics, size of volcanic eruptions, determining intensity of earthquakes (Richter), Population of people.

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John Napier and Joost Burgi and discovered in the castle of Merchiston of Scotland. They discovered logarithms to simplify math calculations

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The power to which a number must be raised in order to get another number