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butalik [34]
3 years ago
13

The loudness, L, measured in decibels (Db), of a sound intensity, I, measured in watts per square meter, is defined as L = 10 lo

g StartFraction I Over I 0 EndFraction, where I 0 = 10 Superscript negative 12 and is the least intense sound a human ear can hear. What is the approximate loudness of a dinner conversation with a sound intensity of 10–7?
–58 Db
–50 Db
9 Db
50 Db
Mathematics
2 answers:
Naddika [18.5K]3 years ago
8 0

Answer:

D. 50 Db on ed

i took the test and i got it right

Inessa [10]3 years ago
7 0

Answer:

50 Db

Step-by-step explanation:

we know that

The loudness in decibels is given by the formula

L = 10log(\frac{I}{I_0})

where

I  = sound intensity in watts per square meter (Watts/m^2)

I₀ = reference intensity, = 10^(-12) Watts/m^2

so

For I=10^(-7) Watts/m^2

substitute in the formula above and solve for L

L = 10log(\frac{10^{-7} }{10^{-12}})

L = 10log(10^{5})

L = 10 (5)=50\ Db

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stealth61 [152]

Answer:

x = 10.52 m

Step-by-step explanation:

Given that,

Length of a park = 90 m

Width of a park = 60 m

Area, A = 9000 m²

A uniform strip borders all four sides of the park for parking. We need to find the width of the strip. Let it is x. Now the area becomes,

(90+2x)(60+2x) = 9000

4x^2 +120x +180x =5400 = 9000\\\\x=10.52\ m

So, the width of the strip is equal to 10.52 m.

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2 years ago
i think of a number. if i divide the sum of 5 and the number by 3, the result is 2 less than one quarter of the number. find the
Marrrta [24]

Answer:

x = 4.75

Step-by-step explanation:

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Solve F(x) for the given domain. <br> F(x) = x ^2 + 3x - 2 <br> F(3) = <br> 13<br> 16<br> 40
olchik [2.2K]
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The measure of the angles of a triangle are given as 2x°, 3x°, and 4x°. What are the measures of each angle?
zmey [24]

Step-by-step explanation:

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Hence angles respective are..

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faust18 [17]

Answer:

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Step-by-step explanation:

The maximum profit would assume Burger King does not sell any burgers on Friday, therefore all 500 burgers were sold at $3.50. 500*$3.50 = $1750 in maximum earnings for the week. More information is needed about the split between the burgers sold over the week.

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