Choose the One Alternative That Best Completes the Statement or Answers

question 178

Multiple Choice

Choose the one alternative that best completes the statement or answers the question.
-Use the formula $\mathrm { D } = 10.0 \log \left( \mathrm { S } / \mathrm { S } _ { 0 } \right)$ , where the loudness of a sound in decibels is determined by $\mathrm { S }$ , the number of watt $/ \mathrm { m } ^ { 2 }$ produced by the soundwave, and $\mathrm { S } _ { 0 } = 1.00 \times 10 ^ { - 12 }$ watt $/ \mathrm { m } ^ { 2 }$ . A certain noise produces $8.34 \times 10 ^ { - 5 } \mathrm { watt } / \mathrm { m } ^ { 2 }$ of power. What is the decibel level of this noise? (Round to the nearest unit.)

• A) 69 decibels
• B) 79 decibels
• C) 182 decibels
• D) 8 decibels

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Definitions:

Investment Dollars

The amount of money committed to investments with the expectation of generating a future return.

Discount Rate

The interest rate used to discount future cash flows to their present value, reflecting the time value of money.

Annual Cost Savings

The reduction in total costs achieved on an annual basis through efficiency improvements, cost-cutting measures, or operational changes.

Investment Cost

The total amount of money spent on acquiring or investing in assets, including initial setup, purchasing, and any other related costs.