Math

Refine Search

How do you determine whether to use a dot plot or a stem-and-leaf plot?

Dot plots and stem-and-leaf plots look and behave similarly. They have a list of increasing values or groups of values on one side of a line, and on the other side of the line, they mark how often those values occur. Usually, dot plots are easier to make, but stem-and-leaf plots give more information in some cases.\nDot plots usually list the values or intervals horizontally and stack "X"s above each interval to tally their frequency. Stem-and-leaf plots list intervals, often the largest relevant digit, vertically and place the lower-value digits to their right.\nBoth could be used to analyze ..

Continue Reading

How many flat surfaces does a cone have?

A cone has many important features, starting with a circular base and curved side. The apex is defined as the tip of the cone, where the curved surface meets itself at a point. The axis of a cone refers to an imaginary straight line that passes through the center of the base and the apex. Around this line, a cone has rotational symmetry, meaning it is the same shape no matter how a person rotates it. Finally, a cone will have different steepness from the base to the apex, depending on how high the apex is.

Continue Reading

What are some interesting facts about the number 22?

Although the Dallas Cowboys have a policy of not retiring numbers, the number 22 has not been given to a player since Emmitt Smith left the team in 2002. Emmitt Smith was a running back in the NFL for 15 seasons during the 1990s and 2000s. He played professionally for the Dallas Cowboys and Arizona Cardinals and is held in high esteem as one of the greatest running backs in NFL history. As of 2014, he is the only running back to ever win a Super Bowl championship, the NFL Most Valuable Player award, the NFL rushing title, and the Super Bowl MVP award all in the same season.\nThe song "22" was ..

Continue Reading

How do you find the arc of a circle?

Find the arc measureUsing a protractor, measure the angle subtended at the center of the circle by the arc. When measuring, be sure to align the baseline of the protractor with the radius. To get an accurate value, repeat the measurement.Calculate the circumference of the circleMultiply by pi, which is 22/7 by 2, and further multiply the answer by the radius of the circle to get the circumference. For instance, if the radius is 14 centimeters, the circumference is 88 centimeters.Calculate the length of the arcDivide the arc measure by 360 degrees, and then multiply the answer by the circumfere..

Continue Reading

What is a counterexample in geometry?

Geometry is primarily concerned with the formation and interaction of shapes, as well as with the development of logical skills to write proofs of various mathematical facts. An individual can consider the "Similar triangles have at least one side that is congruent." While triangles that are similar do have congruent angles, none of their sides are congruent. Instead, they have to remain in proportion with one another to keep the angles congruent.\nOne can consider triangle ABC with sides of 8, 8 and 4. The fact that two of the sides are congruent to each other means that two angles are as wel..

Continue Reading

What is the area of an ellipse?

If the lengths of the major and minor radii are not labelled, they can be identified visually. Look at an ellipse to identify the shortest possible line that divides the ellipse in half. This is the minor radius. Now, look for the longest possible radius, which is also called the major radius.\nTo illustrate the calculations with a hypothetical example, consider an ellipse that is 6 centimeters long and 7 centimeters high. The area approximately equals 6 times 7 times 3.142, or about 132 square centimeters.

Continue Reading

Where can I find newspaper articles with graphs?

A newspaper article with a graph can be found in a number of newspapers. Anything that provides data can have a graph used in the article. Examples include economics, unemployment, and more.

Continue Reading

What method is used for dividing negative exponents?

The positive exponent k states that k amount of the bases are multiplied together. For example, 2^3 = 2*2*2 = 8.\nThe exponent -k states that 1 is divided by the base k times. For example, 3^(-1) = 1/3 and 3^(-4) = 1/(3*3*3*33) = 1/81. A base to a negative exponent is equal to one divided by that base to the absolute value of the exponent, such that 3^(-4) = 1/(3^4).\nMath Is Fun explains that to multiply by negative exponent, one can divide by the positive exponent. For example, (4^3) * (4^(-2)) = (4^3) * 1/(4^2) = (4^3)/(4^2).\nTo divide by a negative exponent, one treats it like a positive ..

Continue Reading

What are some fun facts about algebra?

The precise meaning of the word "al-jabr" eludes historians, although most agree that it was closely related to the word meaning "restoration." The word comes from a treatise written in 820 A.D. by Muhammed ibn Musa Al-Khwarizmi, which provided for the systematic solution of linear and quadratic equations.\nAlgebra did not always make use of the widespread symbolism that is ever-present in math as of 2014. It underwent three distinct stages that are known as "rhetorical algebra," "syncopated algebra" and "symbolic algebra." Algebra emerged as a branch of mathematics towards the end of the 16th..

Continue Reading

What are compatible numbers?

Numbers are considered simpler when they are round, whole or even. This means quicker processing and more effective mental math. When using compatible numbers, North Star Math recommends finding whole or simple numbers with the least deviation from the original number. Finally, while they are a useful measure in situations where more exact sums are not possible, using compatible numbers reduces precision.

Continue Reading
Showing 2821 to 2830 of 3956 (396 Pages)