Solve the Problem $$\text { quadratic mean } = \sqrt { \frac { \sum x ^ { 2 } } { n } }$$

question 9

Multiple Choice

Solve the problem.
-The quadratic mean (or root mean square) is usually used in physical applications. In power distribution systems, for example, voltages and currents are usually referred to in terms of their root mean square value. The quadratic mean of a set of values is obtained by squaring each value, adding the results, dividing by the number of values (n) , and then taking the square root of that result, expressed as $$\text { quadratic mean } = \sqrt { \frac { \sum x ^ { 2 } } { n } }$$ Find the root mean square of these power supplies (in volts) : 19, 57, 28, 45.

• A)20.0 volts
• B)37.2 volts
• C)74.5 volts
• D)40.1 volts

Understand the effects of international trade on a country's production and consumption possibilities frontiers.

Recognize the impact of economies of scale on the benefits from trade.

Understand the concept and calculation of Days Sales Outstanding (DSO) and its relation to firm's credit and collection policies.

Grasp the economic order quantity (EOQ) model and its relevance in inventory management.

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