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You purchase a $30, nonrefundable ticket to a play at a local theater. Ten minutes into the show you realize that it is not a very good show and place only a $10 value on seeing the remainder of the show. Alternatively you could leave the theater and go home and watch TV or read a book. You place an $8 value on watching TV and a $6 value on reading a book.
Calories
Calories are units of energy used to quantify the amount of energy stored in food and how much energy is utilized by the body.
Sugar
A sweet-tasting, soluble carbohydrate found in many plants, which is commonly used as a sweetener in food.
Slope
The measure of the steepness or incline of a line, defined as the ratio of the vertical change to the horizontal change between two points on the line.
API Gravity Degrees
A measure used in the petroleum industry that expresses the density of petroleum liquids relative to water; higher API gravity indicates a lighter oil.
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