The loudness level of a sound, D. in decibels, is given by the formula D = 10 log ( 10 12 I ) , where 1 is the intensity of the sound, in watts per meter 2 . Decibel levels range from 0, a barely audible sound, to 160, a sound resulting in a ruptured eardrum. (Any exposure to sounds of 130 decibels or higher puts a person at immediate risk for hearing damage.) Use the formula to solve Exercises 117-118. What is the decibel level of a normal conversation, 3.2 × 10 − 6 watt per meter?
The loudness level of a sound, D. in decibels, is given by the formula D = 10 log ( 10 12 I ) , where 1 is the intensity of the sound, in watts per meter 2 . Decibel levels range from 0, a barely audible sound, to 160, a sound resulting in a ruptured eardrum. (Any exposure to sounds of 130 decibels or higher puts a person at immediate risk for hearing damage.) Use the formula to solve Exercises 117-118. What is the decibel level of a normal conversation, 3.2 × 10 − 6 watt per meter?
Solution Summary: The author calculates the decibel level of a normal conversation with underset_65.
The loudness level of a sound, D. in decibels, is given by the formula
D
=
10
log
(
10
12
I
)
,
where 1 is the intensity of the sound, in watts per meter2. Decibel levels range from 0, a barely audible sound, to 160, a sound resulting in a ruptured eardrum. (Any exposure to sounds of 130 decibels or higher puts a person at immediate risk for hearing damage.) Use the formula to solve Exercises 117-118.
What is the decibel level of a normal conversation,
3.2
×
10
−
6
watt per meter?
What is the vertex, axis of symmerty, all of the solutions, all of the end behaviors, the increasing interval, the decreasing interval, describe all of the transformations that have occurred EXAMPLE Vertical shrink/compression (wider). or Vertical translation down, the domain and range of this graph EXAMPLE Domain: x ≤ -1 Range: y ≥ -4.
4.
Select all of the solutions for x²+x - 12 = 0?
A. -12
B. -4
C. -3
D. 3
E 4
F 12
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2.
Select all of the polynomials with the degree of 7.
A. h(x) = (4x + 2)³(x − 7)(3x + 1)4
B
h(x) = (x + 7)³(2x + 1)^(6x − 5)²
☐
Ch(x)=(3x² + 9)(x + 4)(8x + 2)ª
h(x) = (x + 6)²(9x + 2) (x − 3)
h(x)=(-x-7)² (x + 8)²(7x + 4)³
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Chapter 4 Solutions
MyLab Math with Pearson eText -- Standalone Access Card -- for Algebra and Trigonometry (6th Edition)
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