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How many ufo sightings have been reported this year?

Prior to 1994, the NUFORC collected reports of UFO sightings through traditional methods, such as snail mail, faxes or phone calls. After 1994, BBS and email technology became common reporting files as well with online web forms introduced between 2004 and 2006. Reports of UFO sightings typically increase during July and August, as these are months in the United States where people spend more time outdoors.

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What are some tips for solving problems from "Holt Pre-Algebra"?

Equations are central in pre-algebra and algebra math problems, and they often have mixes of numbers, exponents and letters. The letters are designed to substitute for numbers in the context of a complete equation. Understanding that both sides are meant to be equal can help you check your work when you are done. Additionally, use the equations to represent real life finances or situations for more practice, such as using substitutions, equations and fractions to determine how much money you need to purchase something you want.\nBegin by tracking your work using a step-by-step formula. Write o..

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What are the congruent legs of an isosceles triangle also called?

The two congruent sides of an isosceles triangle form the two base angles that are also congruent, which means that both angles have the same measure in degrees. The third interior angle of an isosceles triangle, which is the opposite angle of the base, is called the vertex angle.The height, or altitude, of an isosceles triangle is represented by a line that divides the isosceles triangle into two equal parts, forming two right-angled triangles in the process. The two congruent sides of the isosceles triangle then form the longest sides of the two right-angled triangles.

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How do you find the height of a cylinder?

Determine whether to calculate or measure the height of the cylinderIf you have access to the actual cylinder, take a point along the edge of one face of the cylinder and another point along the edge of the cylinder's other face such that a straight line along the curved side connects the two points on the edge and the line is perpendicular to both faces of the cylinder. The length of this line is its height.\n\nIn the context of a math problem, you should calculate it based on other parameters given in the problem. If you know the volume of the cylinder, and either an end face's are..

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What does X stand for in mathematical functions?

A variable of unknown value can be demonstrated by the equation 2 + x = 6. In this example, x has the value of 4. Likewise, a variable with a variety of values can be demonstrated by the equation 2 + x = y. The value of y, a dependent variable, changes as the independent variable x changes. If x = 3, then y = 5.

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What is 1996 in Roman numerals?

Writing 1996 as a Roman numeral requires breaking it down into 1000 + 900 + 90 + 6. The first M represents the 1000, and the CM represents 900, which is 1000 - 100. The number 90 is written as XC, which is 100 - 10, and the number six is written as VI, which is 5 + 1. The reason for using subtraction to write certain numbers is that a letter is only allowed to appear three times.

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How do you find the volume of a cone?

The height of the cone is different from the slant height. The slant height is the length of a straight line segment running from the vertex of the cone to the perimeter of the base. The height of the cone is the length of a line segment drawn perpendicular to the base connecting the base to the vertex. In the case of a right circular cone, that perpendicular line intersects the base at the center of the circle.

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What is a 10-key adding machine?

The 10-key adding machine is also referred to as a printing machine because it can total up a long list of numbers and then print out the results of the calculation. The adding machine consists of the numbers 0 through 9 and the mathematical function keys for addition and subtraction. There also are other keys, such as the "T" key for total and the asterisk. Depending on the specific type or brand of adding machine, there may be other keys or ways to perform division and multiplication calculations. For example, the Imperial Office Master machine, which was used during the early 1970s, could a..

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How many lines of symmetry does an isosceles trapezoid have?

In the United States, an enclosed two-dimensional quadrilateral figure that contains two opposite parallel segments is called a "trapezoid." The non-parallel sides are referred to as "legs," while the parallel segments are the "bases." In an isosceles trapezoid, the line of symmetry is formed when the trapezoid is divided into two equal parts such that one side exactly mirrors the other. This only occurs when the bisector is perpendicular to the bases. It should be noted that the British term for a trapezoid is a "trapezium."

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What is the adjoint of a matrix?

In all separable Hilbert spaces, the transpose of the conjugate of a matrix is identical to the conjugate of the transpose of the matrix, so it does not matter in which order these operations are performed when calculating the adjoint. Some matrices are their own adjoint. These matrices are called self-adjoint or Hermitian matrices.

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