# Math Calculators

Q:

## Where is the abacus still used today?

A:

The abacus is a basic mathematical computing device. It is still widely used today in Africa, Japan, Russia, China and other countries as a visual aid to facilitate the learning of mathematical concepts.

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• #### Q:What is a real world example for a absolute function?

A: A real world example of an absolute value function is any calculation in which the total depends upon simple addition of all the quantities in the function, regardless of sign. One example of such a calculation is the number of feet traveled by an athlete running around a race track.
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• #### Q:What is the difference between qualitative and quantitative analysis?

A: Qualitative analysis is the scientific study of data that can be observed, but not measured. It is concerned with cataloguing the qualities of what is studied. Quantitative analysis is the study of data that can be measured, the quantities of a category of data. Each type of inquiry contributes important insights to scientific study that the other cannot.
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• #### Q:How do you convert square feet to square meters?

A: Changing square feet to square meters requires use of basic conversion where one square meter equals 10.76 square feet. Hence, one square foot equals approximately 0.093 square meters. A house that has 2,500 square feet is 232.5 square meters in size.
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• #### Q:How can you calculate the mass of a known number of atoms of an element?

A: To calculate the mass of a specific number of atoms of an element, divide the number of atoms by 6.02 x 1023 and then multiply by the molar mass of the element. The process for calculating mass from the number of atoms is the same for all elements.
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• #### Q:What is the formula to convert lbs to kg?

A: The formula to convert kilograms to pounds is pound = kilogram/0.45359237. Conversely, the formula is kilogram = pound x 0.45359237. One kilogram is equal to roughly 2.2 pounds, and 1 pound is roughly 454 grams.
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• #### Q:What does the word "term" mean in mathematics?

A: The word "term" is used in mathematical equations to describe either a single number, or numbers and variables multiplied together. Numerical terms are then grouped into expressions to come up with a definitive answer to the equation.
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• #### Q:What are some early counting devices?

A: Two early counting devices were the abacus and the Antikythera mechanism. The abacus and similar counting devices were in use across many nations and cultures. The Antikythera mechanism hails from the Greek island of Antikythera.
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• #### Q:What is the formula used to find percent recovery?

A: When purifying a substance in chemistry, use (collected mass/starting mass)*100 to calculate percent recovery. This formula is also commonly stated as (pure product recovered/crude material used)*100.
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• #### Q:What is the formula used to find the area of an isosceles triangle?

A: The common formula to find the area of an isosceles triangle is area equals 1/2 * base * height of triangle. The height is the line bisecting the two equal sides of the triangle and intersects the midpoint of the base.
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• #### Q:Where is the abacus still used today?

A: The abacus is a basic mathematical computing device. It is still widely used today in Africa, Japan, Russia, China and other countries as a visual aid to facilitate the learning of mathematical concepts.
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• #### Q:What do the keys on a calculator mean?

A: There are many kinds of calculators, but most calculators have the same standard keys that allow users to complete a variety of calculations. The number keys and addition, subtraction, multiplication, division and equal signs are all very straightforward, but the functions of the other keys are not so well-known.
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• #### Q:What is 178 centimeters converted to feet?

A: The length of 178 centimeters is equal to 5.84 feet or 70.08 inches. A length of 1 foot is equal to 30.48 centimeters or 12 inches. A meter is equal to 100 centimeters or 3.28 feet.
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• #### Q:How do I calculate occupant load?

A: Calculating the occupant load of a room or building requires first calculating the area of the space in question in square feet, and then dividing the area by the occupant load factor specified by the International Building Code. The resulting number from this calculation determines how many occupants can legally use the space at one time.
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• #### Q:What do you call a number that has more than two factors?

A: A number with more than two factors is called a composite number. A factor is a number that is evenly divisible into another number. Prime numbers, by definition must be larger than one and have only themselves and one as factors.
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• #### Q:How are metric units converted?

A: Because the metric system is a base 10 system, converting between units and subunits is accomplished by either dividing or multiplying by multiples of 10. To convert from a smaller to a larger metric unit, division by a multiple of 10 is used. To convert a larger metric unit to a smaller one, multiplication by 10, 100 or 1,000 is used.
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• #### Q:How do you use a number pattern calculator?

A: Simple-to-use number-pattern calculators for data sets such as arithmetic sequences and geometric sequences can be found on Calculator.net. In these calculators and similar tools, a missing value of a number sequence is calculated when a user specifies the defining pattern behind the set of numbers and selects the appropriate variables. AlteredQualia.com contains a number sequence solver that computes the defining pattern behind a valid set of numbers entered by a user.
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• #### Q:How do you use a binary converter to convert from decimal?

A: Converting decimal to binary requires repeated division by 2 and taking the remainder to determine whether a given placeholder of the digit is 0 or 1. If there is a binary converter online, it's possible to simply enter the decimal number and let the program do the work. Knowing how to do it manually is useful to computer programmers.
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A: To calculate the estimated required minimum distribution, take the amount of the retirement account balance as of Dec. 1 of the previous year and divide that amount by a life expectancy factor determined by the Internal Revenue Service, explains Vanguard. The life expectancy factor depends on several criteria.
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• #### Q:What are some online math calculators?

A: Some popular online math calculators are MathWay.com, WolphramAlpha.com and Calculator.net. Each of these include tools to help you solve problems in basic math, algebra, geometry, trigonometry, calculus and even chemistry.
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• #### Q:What is a vertex form converter?

A: A vertex form converter is a computer program or a web application that converts between the standard form of a quadratic equation and its vertex form. Because vertex form is easier to visualize and plot than standard form, such converters are especially helpful when manual plotting needs to be done.
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• #### Q:Are there any free calculators for converting percentages to decimals?

A: Calculator Soup and Rapid Tables offer free online calculators for converting percentages to decimals. Calculator Soup converts the entered percentage to a decimal, revealing the answer and the calculation of dividing the percentage by 100. The site also offers a reset button to quickly start another computation.
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