Two People Are Talking at a Distance of 3

question 13

Multiple Choice

Two people are talking at a distance of 3.0 m from where you are,and you measure the sound intensity as 1.1 × 10^-7 W/m².Another student is 4.0 m away from the talkers.Calculate a reasonable estimate for the sound intensity that the other student measures.

• A)6.2 × 10^-8 W/m²
• B)1.5 × 10^-7 W/m²
• C)8.3 × 10^-8 W/m²
• D)7.8 × 10^-7 W/m²
• E)2.5 × 10^-8 W/m²

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Definitions:

Ordinary Simple Interest

Interest calculation method using a fixed annual rate, based on the principal amount and the time invested or borrowed.

360-Day Year

A simplified accounting method where the year is assumed to have only 360 days for the purpose of interest calculations.

Exact Interest

Interest calculation method based on a 365-day year or actual number of days in a loan period.

365-Day Year

A method of computing interest where the basis for the calculation is a full 365-day year, used to give a more precise daily rate.