You Stand on the Curb Waiting to Cross the Street

question 1

Multiple Choice

You stand on the curb waiting to cross the street.Suddenly you hear the sound of a horn from a car approaching you with a constant speed.You hear a frequency of 90 Hz.After the car passes you by,you hear a frequency of 75 Hz.What speed was the car traveling?

• A)7.0 m/s
• B)11 m/s
• C)25 m/s
• D)31 m/s
• E)33 m/s

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Definitions:

MU/P Ratio

The ratio of marginal utility (MU) to price (P), used to determine the optimal consumption point where consumer satisfaction per unit of cost is maximized.

Marginal Utility

The heightened benefit received from using one more unit of a good or service.

Marginal Utility Per Dollar

The additional satisfaction obtained from spending one more dollar on a good or service.