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How can you get expert-level help on math topics?

The mathematical community at Math.StackExchange.com consists of researchers, professionals, professors, students and more. Stack exchanges are question and answer websites that are dedicated to specific topics. Questions on any expert-level mathematics topic are welcome at there, where professionals in all mathematical fields will be able to weigh in and share their answer. It can also be helpful to search the site for related questions that may have been addressed in the past.\nMost mathematics questions are well suited for the website's community. Questions that are of specific interes..

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What is a picture graph?

One benefit of a picture graph is that it makes it easier for people to understand information. Data presented verbally is usually clarified when a picture graph is utilized.\nPicture graphs, however, often do not display data as accurately as other types of graphs. For example, in a picture graph illustrating the number of cars a dealership sells each month, an image of one car represents 10 cars sold. If the dealership sells 12 cars, the picture graph shows an image of one car along with a small portion of another car. This makes it difficult for the person viewing the graph to know exactly ..

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What is the difference between the dependent variable, the independent variable and the controlled variable?

The dependent variable is the result of the study, explain researchers at the University of North Carolina at Pembroke. The dependent variable shows the effect of each independent variable. Researchers believe that the independent variables in a study explain the change in the outcome or dependent variable.\nFor example, in a study about the effect of extra-curricular programs and the completion of high school, each program is an independent variable, while the graduation rate is the dependent variable. The independent variable is the cause, and the dependent variable is the effect. Common con..

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How many faces does an octagonal pyramid have?

Any pyramid whose regular polygonal base has n sides will have n+1 faces, 2n edges and n+1 vertex. The volume of an octagonal pyramid is calculated by (b*h) / 3 where b is the base area of the pyramid and h is the vertical height of the pyramid (from the center of the base to the apex). The surface area is calculated by simply adding the base area to the lateral area (area of the eight triangular faces).There are several other types of pyramids, and each is named after the shape of its base. If the apex is located directly above the center of the base, the pyramid is referred to as a right pyr..

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What is a divisor in math?

The divisor can also be considered one of the integer factors of the dividend, with the quotient being another factor. Divisors are typically defined as both positive and negative numbers, but some definitions of the divisor limits the term to positive numbers.\nThe term divisor is one of the specialized words for terms in a division problem. In the previous example, 20 is called the dividend, and the answer to the problem is called the quotient.

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What is the difference between linear foot and square foot?

Two objects 1 foot apart are at a distance of 1 linear foot from each other; a person who is 6 feet tall measures 6 linear feet.\nThe area of a square with sides each measuring 1 foot is 1 square foot (1 x 1). The area of a backyard measuring 25 feet wide and 40 feet long has an area of 1,000 square feet (25 x 40).

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How did Albert Einstein come up with E=mc^2?

Prior to Einstein’s famous equation, the scientific world viewed mass and energy as separate entities that could not be interconverted. Scientists also viewed distance and time as constants, and thereby speed as a variable, including the speed of light. These theories in science explained most natural phenomena, but not all. There were some exceptions that did not fit these guidelines but were largely ignored until Einstein provided the link between mass and energy. For example, Marie Curie was unable to explain why certain radioactive isotopes emitted energy for years on end without running..

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How many decimal places do you generally round off to?

Significant digits in numbers start at the first non-zero digit and end at the last digit. In order to find the amount of significant digits in a number, Hotmath.com advises to count all non-zero digits and any zero digit with a non-zero digit to its left. This avoids a large count for numbers with long strings of zero digits after a significant digit.\nIf the calculation is multiplication or division, this procedure should be completed for both operands, and the smaller one should be used as the amount to round to. If the calculation is a power or root, the amount to round to should be equal ..

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What is a geometric pattern in math?

For example, in the geometric pattern 8, 16, 32, 64 and so on, 2 is the multiplier, and every successive term in the sequence is obtained by multiplying the previous term by 2. In general, a geometric pattern can be represented as: {a, ar, ar^2, ar^3...ar^n}, where "a" is the first term and "r" is the multiplier between each term.

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What are the advantages of parametric statistics?

Data for parametric statistics follows a normal distribution, according to Minnesota State University. This means the data points have a mean, or an average, and standard deviation, the standardized dispersion in a data set. Normal data sets have a linearity, which represents a straight line through the data on a graph. Because the data follows a mathematical standardization, researchers make inferences about the data. Parametric statistics is useful for predictions of possible data points not available within the data set. Nonlinear data becomes linear through the use of data transformation i..

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