How should you figure out your profit? If you have an item that you are selling, should you price it at 25% over its cost to you, or should you price it so that your margin is 25%. Many people think that their profit will be the same either way. Is that true?
Author: Ryan McQuade
Interest
Which form of interest, simple or compound, is the fairest? If you were buying a house or a car which would you rather have, which would you consider fair? Or if you had your money in a bank account earning interest, which would you consider the fairest way to calculate that interest? We will show you how to calculate each and help you think about what is fair as far as interest is concerned.
Exploring Triangles
Create, manipulate, and explore triangles in this live interactive spreadsheet. On the surface, a triangle is being drawn on a graph, but the real magic lies in the formulas used to make this spreadsheet work.
Hit Streak
In 1941, Joe DiMaggio got a hit in 56 straight games. This record has never been beaten. Some say it is the greatest record in all of sports. You can develop a simulation of DiMaggio’s streak to see why it is considered so difficult to beat. And you can decide for yourself whether you think this is the greatest record in all of sports and one that can never be beaten. This fascinating Lab will involve you in probability, random number generation, and some very interesting spreadsheet rules.
Decimal Subtraction
Decimal subtraction is one of a series of Labs to help you understand and learn to use decimals. I think you will find it fun because it uses random numbers and it will help you visualize decimal operations. Take a look at Decimal Addition and Decimal Multiplication and Decimal Division. Remember like all of our spreadsheets you can look at and change the rules to try different things.