At a Distance of 15

question 12

Multiple Choice

At a distance of 15.0 m from a sound source,the intensity level is 60.0 dB.What is the intensity level (in decibels) at a point 2.00 m from the source if the source radiates equally in all directions?

• A)55.7 dB
• B)57.5 dB
• C)75.5 dB
• D)77.5 dB

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Definitions:

Payback Period

The time duration required for an investment to generate cash flows sufficient to recover the initial cost of the investment.

Net Present Value

The difference between the present value of cash inflows and the present value of cash outflows over a period, used in capital budgeting to assess the profitability of an investment.

Simple Rate

A basic form of interest calculation representing a percentage of the principal amount over a certain period of time.

Payback Period

The payback period is the duration of time it takes to recover the cost of an investment. This metric is commonly used to assess the feasibility or profitability of a project.