Square Roots of Decimal Numbers and Perfect Square Decimals
Finding the square root of a decimal is discussed, noting that any decimal that does not have an even number of places after the decimal cannot have an exact square root.
Solving a Complicated Mixture Problem
A complicated word problem involving percentages is broken into simpler parts and a solution found.
Review of Ratios
A ratio is a direct comparison between two numbers. A batting average, which is the ratio of a player's hits to the number of times at bat, is calculated.
Practical Problem: Threshold Weight
Direct variation is used in a practical problem to find the threshold weight for men of different heights.
Introduction to Inequalities and Solution Sets
Inequality statements are defined, solution sets explained, the use of a number line demonstrated, and the less than and greater than symbols illustrated.
Practical Problem: The Height of a Stack of Newspapers
Using the slope-intercept form of equation, a practical problem involving the rate of growth of a stack of newspapers is calculated.
Fractions, Decimals, and Percents
Both business people and consumers must learn to work with fractions, decimals and percents in addition, subtraction, multiplication and division.
Finding a Store's Inventory Ratio
The ratio of total sales to the average value of inventory is a business's inventory ratio. It is determined by dividing sales by inventory.
Using Two Points on a Line to Write an Equation
Using the coordinates of two points on a line to write an equation involving the Celsius and Fahrenheit temperature scales.