John Is Trying to Decide How to Divide His Time

question 115

Multiple Choice

John is trying to decide how to divide his time between his job as a stocker in the local grocery store, which pays $7 per hour for as many hours as he chooses to work, and cleaning windows for the businesses downtown. He makes $2 for every window he cleans. John is indifferent between the two tasks, and the number of windows he can clean depends on how many hours he spends cleaning in a day, as shown in the accompanying table.  
The first hour John spends cleaning windows costs him ________ that he could have earned in the grocery store.

• A)$2
• B)$7
• C)$14
• D)$18

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Definitions:

Atomic Open Sentence

A type of statement in logic, which contains at least one variable, and becomes a proposition once the variables are replaced by specific values.

Compound

A substance formed from two or more elements chemically united in fixed proportions, or in logic, a sentence that combines two or more atomic sentences with logical connectives.

Atomic

Relating to atoms, the basic units of matter and the defining structure of elements.

Symbolize

To represent ideas, concepts, or objects with symbols.