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What does central tendency mean in math?

The mean is the arithmetic average. Mathematicians calculate it by finding the sum of a set of numbers and dividing it by the number of items in the set. It is the most popular of all the measures of central tendencies and provides one single answer that is useful in comparing two sets of numbers. However, extreme values, known as outliers, affect the mean.\nThe median is the middle value when data points are arranged in order from smallest to largest. When the number of data points is even, the median is the mode of the two central numbers. Medians are useful when there is an outlier, and the..

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What are the rules for adding integers?

Adding two positive integers together will always result in a positive integer. For example, 6 + 4 = 10. To add two negative integers, add the numbers together and place a negative sign in front of the answer. For example, -12 + (-4) = -16. To add a negative integer and a positive integer, subtract the negative integer from the positive integer. For example, -4 + 9 = 9 - 4 = 5. If the negative integer has a higher number value than the positive integer, subtract the smaller value from the larger and put a negative sign in front of the answer. For example, -16 + 6 = -10.

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What are some ideas for mathematics projects?

Curves can be drawn using various lengths and angles of straight lines, yielding unique and interesting parabolic art. The fourth dimension is not sensible by humans; however, it is quantifiable with geometry. Pi is an irrational number generated using various methods of series mathematics. The Fibonacci has many interesting applications to the real world such as the golden ratio, music, and natural formations.

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What is the Roman numeral MM?

Roman numerals are also written highest to lowest, with the highest numbers on the left and the lowest on the right. Roman numerals are also written using the smallest amount of symbols possible. Therefore, even though CCCCCCCCCCCCCCCCCCCC would also be 2,000, since C is the Roman numeral symbol for 100, it is an incorrect way to write 2,000, because it is not the smallest number of characters in which 2,000 can be expressed.

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What is a 3D pentagon shape called?

The pentagonal prism should not be confused with a pentahedron, which is a 3D polyhedron with five faces. An example of a pentahedron would be a triangular prism – two triangles and three quadrilaterals.\nA pentagonal prism is a kind of heptahedron because it has seven faces – two pentagons and five quadrilaterals. Additionally, a pentagonal prism has 15 edges and 10 vertices.

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How many combinations of quarters, dimes and nickels could be used to pay 50 cents in change?

The possible combinations include 2 quarters; 5 dimes; 1 nickel, 2 dimes and 1 quarter; 2 nickels and 4 dimes; 3 nickels, 1 dime and 1 quarter; 4 nickels and 3 dimes; 5 nickels and 1 quarter; 6 nickels and 2 dimes; 8 nickels and 1 dime; and 10 nickels.\nWhen including pennies, there are 49 possible combinations of coins that make up 50 cents in change. When including the half dollar, there are 50 combinations.\nThe United States Mint first produced coins in 1792. Coins were initially comprised entirely of silver until the silver value exceeded the coins' face values in the 1960s. In 1965,..

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What is an easy explanation of long division?

The general symbol for long division, as seen at MathIsFun.com, is an L rotated 90 degrees clockwise. The dividend, or number to be divided, fits inside this symbol while the divisor, or the number doing the dividing, falls just to the left of its short edge.\nTo do long division, start by dividing the first digit of the dividend by the divisor. If the quotient is zero, instead divide the first two digits, and so on until the quotient is at least one. Write that quotient above the last digit of the part of the dividend just utilized. Then multiply it by the divisor and subtract that amount fro..

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How do you convert from log to exponential form?

Understand the components of a logarithmA logarithm is the opposite of an exponential expression. An exponent gives a product created by raising a base to a certain power; a logarithm determines to what power a base must be raised to produce a given value.\n\nIf b^x = y, then logb(y) = x. \n\nIn the exponent equation, b is the base, x is the exponent, and y is the product created; in the logarithm, b is still the base, y is called the argument, and x is the answer.Figure out which values you haveNot all exponents or logarithms are given as full equations. Many logarithms will be given without ..

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What is a foreign key in a database?

A primary key uniquely identifies each record in a database table. Primary keys cannot contain null values. Each table in the relational database can only have one primary key. When rows in the parent table (the table containing the primary key value) are deleted, the matching foreign key records in the child table (the table with corresponding foreign key) are also deleted, thus creating a cascading delete. This logical constraint ensures referential integrity of data in the relational database.

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What is A = P(e)^(rt)?

In the formula A = P(e)^(rt), the value "P" represents the principal, "r" represents the annual interest rate as a decimal, "t" represents the number of years and "A" represents the future value. The value "e" is a constant known as Napier's number, equal to approximately 2.7183. The formula is an example of exponential growth. Continuous interest is assumed to compound at infinitely small time intervals, so continuously compounded interest results in a higher future value than interest that is compounded at regular intervals, such as monthly.

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