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How do you spell the number 90?

The number 90 is often misspelled because many people drop the "e" and leave the word as "ninty."\nNumbers between 20 and 100 that are multiples of 10 are spelled from a form of the base number followed by the -ty: twenty, thirty, forty, fifty, sixty, seventy, eighty and ninety. For the numbers between them, simply append the spelled number in the ones place to the spelled number in the tens place. For example, to spell 47, simply add "seven" to the end of the spelled number forty to get "forty-seven."

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How do you add numbers with decimals?

Adding numbers with decimals is similar to adding whole numbers. In both cases, line the numbers up vertically so that each place value matches vertically to the places values in other numbers. When adding, simply drag the decimal straight down where it exists in the column. If one number has more place values to the right or to the left of the decimal point than other numbers have, simply add the existing numbers as though the digit zero exists in those columns.

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What is an oblique asymptote?

A rational function is any function that is written as a ratio of two polynomials. For example, take the rational function y = (3x^2 + 2)/(x + 1). Because x is raised to the second power in the numerator, and only to the first power in the denominator, its degree difference is exactly one greater, resulting in asymptotes that are neither vertical nor horizontal. To find the linear equation for a slant asymptote, divide the numerator by the denominator and discard the remainder.

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What does quotient mean in math?

Division is the mathematical action of splitting a number into equal parts. There are two common symbols used to indicate division: two vertical dots with a horizontal line between them and a slash. Division is the opposite of multiplication and if the multiplication is known than the division is known. For example, since 5x3 is equal to 15, then 15/5 is equal to 3. In some cases, the number cannot be divided evenly. When there is an amount left over, it is called the remainder. For example, 7/2 results in 3 with a remainder of 1.When dividing positive and negative integers, it is important to..

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What are some calculus project ideas?

Another calculus project is estimating the volume of water that runs through a creek. To do this, students create a cross section of the creek bottom. They take data measurements, including the length of time it takes a ping pong ball to travel 25 feet. This helps them arrive at the measurement for the area of the creek bottom. They use these measurements and calculus formulas to make their estimation.\nStudents can also use calculus to determine information about a wine glass. For this project, they use measurement and calculations to determine the following: the inner volume of the glass, th..

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What are some examples of qualitative and quantitative variables?

The difference between qualitative and quantitative variables lies in the way each are measured. Qualitative variables have no inherent order to them while quantitative variables are numbers that can be naturally ordered. Qualitative variables are often referred to as categorical variables because they can be placed into categories, such as male or female. According to OnlineStatBook, these variables can be ordinal, interval or ratio variables.

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How do you find negative variance?

Determine the mean of a set of numbersThe mean of a data set is the average. The formula is x_bar = sum(x_i) / N, where N is the number of data points. However, if the data set is taken from a sample rather than a population, the number of data points is N - 1.Find the squared differencesFor each number in the data set, subtract the mean, and square the result. Add all the results together. The formula is sum(x_i - x_bar)^2. Even if the result from subtracting the mean from the data point is negative, the fact that it is squared ensures the variance cannot be negative.Find the average of squ..

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How can you find the perimeter of a hexagon?

A polygon is a closed shape with many sides. A hexagon is a specific type of polygon which has only 6 sides. The perimeter of a polygon is the total length of all its sides and can be determined by simply adding all of the given sides. A regular hexagon is a special kind of hexagon where all its six sides are equal in length. Instead of adding the 6 sides to find the perimeter, any 1 of its sides can be multiplied by 6.\nFor a regular hexagon, instead of the length of the side, the area of the shape might be given. In such cases, the perimeter can be found by first doubling the area and then d..

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How do you find the area of a hexagon?

Identify what measurements are known about the hexagonDecide whether the hexagon is regular or irregular. Regular hexagons are defined as a hexagon with six equal sides. For a regular hexagon, knowing one measurement leads easily to knowing all the other measurements. For an irregular hexagon, each side, radius and apothem might be a different length. This requires a great many numbers to be identified before beginning to make calculations. Find the shapes inside the hexagonFor a regular hexagon, there are six equilateral triangles inside it, with each side being the base of each triangle. For..

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What are the odds of getting hit by a car?

The Centers for Disease Control report that about 4,280 pedestrians die as the result of being struck by cars each year and another 70,000 pedestrians are injured as the result of being hit by a car. This is a total of 74,280 pedestrians struck by cars each year. According to the United States Census Bureau, the population of the United States is currently 318,882,070. When the population of the United States is divided by the number of pedestrians killed or injured each year, the result is one in 4,292. Odds increase, however, in high-traffic areas and areas in which there are a lot of pedest..

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