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(b) You walk in a straight line away from a speaker. Suppose the volume of the sound, Vin decibels, is a function of the distance, x in feet, from the speaker. Which of the following could be a practical interpretation of V'(20) = -20 ? The volume of the sound will be approximately O 20 decibels lower for every 20 feet you move away from the speaker. O 20 decibels if you are 20 feet from the speaker. 20 decibels lower if you move from 20 feet to 21 feet from the speaker. O 20 decibels if you are 20 feet from the speaker. O 20 decibels lower if you move 20 feet farther from the speaker.

(b) You walk in a straight line away from a speaker. Suppose the volume of the sound, Vin decibels, is a function of the distance, x in feet, from the speaker. Which of the following could be a practical interpretation of V'(20) = -20 ? The volume of the sound will be approximately O 20 decibels lower for every 20 feet you move away from the speaker. O 20 decibels if you are 20 feet from the speaker. 20 decibels lower if you move from 20 feet to 21 feet from the speaker. O 20 decibels if you are 20 feet from the speaker. O 20 decibels lower if you move 20 feet farther from the speaker.

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter9: Quadratic Functions And Equations
Section9.6: Solving Quadratic Equations By Using The Quadratic Formula
Problem 28PPS
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(b) You walk in a straight line away from a speaker. Suppose the volume of the sound, Vin decibels, is a function of the distance, x in feet, from the speaker. Which of the following could be a practical interpretation of V'(20) = -20 ? The volume of the sound will be approximately O 20 decibels lower for every 20 feet you move away from the speaker. O 20 decibels if you are 20 feet from the speaker. 20 decibels lower if you move from 20 feet to 21 feet from the speaker. O 20 decibels if you are 20 feet from the speaker. O 20 decibels lower if you move 20 feet farther from the speaker.
Transcribed Image Text:(b) You walk in a straight line away from a speaker. Suppose the volume of the sound, Vin decibels, is a function of the distance, x in feet, from the speaker. Which of the following could be a practical interpretation of V'(20) = -20 ? The volume of the sound will be approximately O 20 decibels lower for every 20 feet you move away from the speaker. O 20 decibels if you are 20 feet from the speaker. 20 decibels lower if you move from 20 feet to 21 feet from the speaker. O 20 decibels if you are 20 feet from the speaker. O 20 decibels lower if you move 20 feet farther from the speaker.
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