What Contributions Did Aristarchus, Eratosthenes, and Euclid Make to Our

question 6

Essay

What contributions did Aristarchus, Eratosthenes, and Euclid make to our knowledge of the world?

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Definitions:

Break-even Sales

The amount of revenue needed to cover total costs, both fixed and variable, indicating the point at which a company neither makes a profit nor incurs a loss.

Margin of Safety

The difference between actual or projected sales and the sales level necessary to break even, as a buffer against uncertainty.

Contribution Margin

The difference between sales revenue and variable costs of a product or service, indicating how much contributes towards covering fixed costs and profit.

Variable Costs

Costs that vary in direct proportion to changes in the level of production or sales.