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- https://math.libretexts.org/Courses/Cerritos_College/Mathematics_for_Technology/03%3A_Module_3-_Probability_and_Statistics/3.14%3A_Measures_of_Central_Tendency_and_the_Normal_DistributionThe standard deviation is a measure of the spread of the data: data with lots of numbers close to the mean has a smaller standard deviation, and data with numbers spaced further from the mean has a la...The standard deviation is a measure of the spread of the data: data with lots of numbers close to the mean has a smaller standard deviation, and data with numbers spaced further from the mean has a larger standard deviation. (In this textbook, you will be given the value of the standard deviation of the data and will never need to calculate it.) The standard deviation is a measuring stick for a particular set of data.
- https://math.libretexts.org/Courses/Northeast_Wisconsin_Technical_College/College_Technical_Math_1A_(NWTC)/01%3A_Operations_with_Real_Numbers/1.02%3A_Negative_NumbersNegative numbers are a fact of life, from winter temperatures to our bank accounts. Let’s practice evaluating expressions involving negative numbers.
- https://math.libretexts.org/Courses/Northeast_Wisconsin_Technical_College/College_Technical_Math_1A_(NWTC)/02%3A_Working_with_and_Converting_Measurements/2.04%3A_Conversions_with_TimeThis page provides insights on converting measurements of time and rates, highlighting the complexities due to the variability in days across months and years. It includes conversion factors for vario...This page provides insights on converting measurements of time and rates, highlighting the complexities due to the variability in days across months and years. It includes conversion factors for various time units and exercises on calculating time in minutes for a year and a lifespan of one billion seconds. Additionally, it features exercises related to Usain Bolt's sprint speed and an F-15 fighter jet, focusing on averages, distances, and fuel efficiency.
- https://math.libretexts.org/Courses/Northeast_Wisconsin_Technical_College/College_Technical_Math_1A_(NWTC)/08%3A_Trigonometry/8.02%3A_TrianglesThis page explains triangle classification by sides (equilateral, isosceles, scalene) and angles (obtuse, right, acute). It introduces the Pythagorean theorem, essential for determining properties of ...This page explains triangle classification by sides (equilateral, isosceles, scalene) and angles (obtuse, right, acute). It introduces the Pythagorean theorem, essential for determining properties of right triangles. The page includes exercises for classifying triangles and applying the theorem to find missing side lengths and check for right angles, alongside calculations for square roots.
- https://math.libretexts.org/Courses/Northeast_Wisconsin_Technical_College/College_Technical_Math_1A_(NWTC)/01%3A_Operations_with_Real_Numbers/1.04%3A_FractionsThis page covers the concept of fractions, including definitions, simplification, and various operations like addition, subtraction, multiplication, and division, with a focus on mixed numbers. It pro...This page covers the concept of fractions, including definitions, simplification, and various operations like addition, subtraction, multiplication, and division, with a focus on mixed numbers. It provides real-life contexts, exercises for practice, and answers for self-checking.
- https://math.libretexts.org/Courses/San_Joaquin_Delta_College/Technical_Mathematics_SJDC_1/01%3A_Operations_with_Real_Numbers/1.03%3A_FractionsThis page offers a comprehensive guide on fractions, covering definitions, operations (addition, subtraction, multiplication, division), simplification, and conversions between mixed and improper frac...This page offers a comprehensive guide on fractions, covering definitions, operations (addition, subtraction, multiplication, division), simplification, and conversions between mixed and improper fractions. It includes exercises with solutions to reinforce the concepts and also explains writing fractions as decimals. Additionally, it discusses the addition and subtraction of mixed numbers, highlighting carrying or borrowing, along with calculations involving mixed numbers.
- https://math.libretexts.org/Courses/San_Joaquin_Delta_College/Technical_Mathematics_SJDC_1/06%3A_Geometry/6.02%3A_Area_of_Polygons_and_CirclesWe have seen that the perimeter of a polygon is the distance around the outside. Perimeter is a length, which is one-dimensional, and so it is measured in linear units (feet, centimeters, miles, etc.)...We have seen that the perimeter of a polygon is the distance around the outside. Perimeter is a length, which is one-dimensional, and so it is measured in linear units (feet, centimeters, miles, etc.). The area of a polygon is the amount of two-dimensional space inside the polygon, and it is measured in square units: square feet, square centimeters, square miles, etc.
- https://math.libretexts.org/Courses/San_Joaquin_Delta_College/Technical_Mathematics_SJDC_1/04%3A_Percents/4.03%3A_Percents_Problems_and_Applications_Part_2This page explains how to determine the original value after a percent change, highlighting common mistakes of applying percentages to the new amount rather than the original. It includes examples lik...This page explains how to determine the original value after a percent change, highlighting common mistakes of applying percentages to the new amount rather than the original. It includes examples like tax increases and discount decreases, alongside exercises for practice. The correct methodology involves dividing the new amount by 112% or 88%, depending on the context.
- https://math.libretexts.org/Courses/Northeast_Wisconsin_Technical_College/College_Technical_Math_1A_(NWTC)/07%3A_Geometry/7.05%3A_Volume_of_Common_SolidsThe surface area of a solid is the sum of the areas of all its faces; therefore, surface area is two-dimensional and measured in square units. The volume is the amount of space inside the solid. Volum...The surface area of a solid is the sum of the areas of all its faces; therefore, surface area is two-dimensional and measured in square units. The volume is the amount of space inside the solid. Volume is three-dimensional, measured in cubic units. You can imagine the volume as the number of cubes required to completely fill up the solid.
- https://math.libretexts.org/Courses/Northeast_Wisconsin_Technical_College/College_Technical_Math_1A_(NWTC)/07%3A_Geometry/7.01%3A_Perimeter_and_CircumferenceA polygon is a closed geometric figure with straight sides. Common polygons include triangles, squares, rectangles, parallelograms, trapezoids, pentagons, hexagons, octagons… The perimeter of a polygo...A polygon is a closed geometric figure with straight sides. Common polygons include triangles, squares, rectangles, parallelograms, trapezoids, pentagons, hexagons, octagons… The perimeter of a polygon is the distance around the outside. In general, to find the perimeter of a polygon, you can add up the lengths of all of its sides.
- https://math.libretexts.org/Courses/Northeast_Wisconsin_Technical_College/College_Technical_Math_1A_(NWTC)/01%3A_Operations_with_Real_Numbers/1.03%3A_DecimalsDecimal notation is based on powers of 10 : 0.1 is one tenth, 0.01 is one hundredth, 0.001 is one thousandth, and so on.
