Solve the Problem $$D = 10 \cdot \log \left( I \times 10 ^ { 12 } \right)$$

question 232

Multiple Choice

Solve the problem.
-The level of a sound in decibels is calculated using the formula
$$D = 10 \cdot \log \left( I \times 10 ^ { 12 } \right)$$
where $I$ is the intensity of the sound waves in watts per square meter. A electric shaver puts out $0.0001$ watt per square meter. How many decibels is that?

• A) \(- 40\)
• B) 8
• C) 800
• D) 80

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Definitions:

Equity Account

An account that represents the ownership interest of shareholders in a corporation, reflected in common and preferred shares.

Fixed Costs

Expenses that do not change with the level of production or sales activities, within a relevant period.

Variable Cost

Costs that vary in total in direct proportion to changes in the level of activity or volume of production.

Operating Leverage

The degree to which a firm or project can increase operating income by increasing revenue, reflecting the proportion of fixed costs to variable costs.