 # How Are Logarithms Used In Real Life?

## What jobs use logarithms?

Careers That Use LogarithmsCoroner.

You often see logarithms in action on television crime shows, according to Michael Breen of the American Mathematical Society.

Actuarial Science.

An actuary’s job is to calculate costs and risks.

Medicine.

Logarithms are used in both nuclear and internal medicine..

## How are logarithms used in medicine?

How do Doctors Use Logarithms? Logarithms are used by Physicians in both nuclear and internal medicine. For example, they are used for investigating pH concentrations, determining amounts of radioactive decay, as well as amounts of bacterial growth. Logarithms also are used in obstetrics.

## Why do we use log?

There are two main reasons to use logarithmic scales in charts and graphs. The first is to respond to skewness towards large values; i.e., cases in which one or a few points are much larger than the bulk of the data. … The equation y = log b (x) means that y is the power or exponent that b is raised to in order to get x.

## What is log2 equal to?

Log base 2 Values Tableslog2(x)NotationValuelog2(1)lb(1)0log2(2)lb(2)1log2(3)lb(3)1.584963log2(4)lb(4)296 more rows•Jul 1, 2020

## Who was invented zero?

MayansThe first recorded zero appeared in Mesopotamia around 3 B.C. The Mayans invented it independently circa 4 A.D. It was later devised in India in the mid-fifth century, spread to Cambodia near the end of the seventh century, and into China and the Islamic countries at the end of the eighth.

## Is log 0 possible?

log 0 is undefined. It’s not a real number, because you can never get zero by raising anything to the power of anything else. You can never reach zero, you can only approach it using an infinitely large and negative power. … This is because any number raised to 0 equals 1.

## What is an Antilog?

An antilog is the reverse of logarithm, found by raising a logarithm to its base. For example, the antilog of y = log10(5) is 10y = 5. The natural logarithm is useful in calculating the amount of time needed to reach a certain level of growth, if, for y = ln(x), y = time and x = value being grown.

## What does a logarithm mean?

In mathematics, the logarithm is the inverse function to exponentiation. That means the logarithm of a given number x is the exponent to which another fixed number, the base b, must be raised, to produce that number x.

## How did logarithms change the world?

He developed this shortcut to save astronomers time and limit “slippery errors” of calculations. His idea was that by “shortening the labours, doubled the life of the astronomer.” With his logarithms, Napier presented a mechanical means of simplifying calculations in his Rabdologiae in 1617.

## How was logarithms invented?

The Scottish mathematician John Napier published his discovery of logarithms in 1614. His purpose was to assist in the multiplication of quantities that were then called sines. The whole sine was the value of the side of a right-angled triangle with a large hypotenuse.

## Who invented logarithms?

John NapierLogarithm/Inventors

## Do humans think logarithmically?

Ask adults from the industrialized world what number is halfway between 1 and 9, and most will say 5. … Cognitive scientists theorize that that’s because it’s actually more natural for humans to think logarithmically than linearly: 30 is 1, and 32 is 9, so logarithmically, the number halfway between them is 31, or 3.

## Can the base of a log be negative?

While the value of a logarithm itself can be positive or negative, the base of the log function and the argument of the log function are a different story. The argument of a log function can only take positive arguments. … Negative numbers, and the number 0, aren’t acceptable arguments to plug into a logarithm, but why?

## What are the log rules?

Basic rules for logarithmsRule or special caseFormulaProductln(xy)=ln(x)+ln(y)Quotientln(x/y)=ln(x)−ln(y)Log of powerln(xy)=yln(x)Log of eln(e)=12 more rows