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Mathematics

2 answers:

uranmaximum [27]4 years ago

8 0

Answer:

C. 2 $\sqrt{29}$

Step-by-step explanation:

Square root of 116 is 10.7703296

Square root of 29 is 5.38516481, but as it is multiplied by 2, it becomes 10.7703296

vagabundo [1.1K]4 years ago

7 0

Answer:

Step-by-step explanation:

The square root of 116 is about ten. Two times the square root of 29 also equals about ten. A equals about 13. B equals about 9. And 13 equals 13 so only C can be correct.

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What is the decibel level of a dog barking with intensity 10−5 watts per square inch? Use a logarithmic model to solve.

Vsevolod [243]

Answer:

The sound intensity is about 101.9 dB

Step-by-step explanation:

Sound intensity is the amount of sound energy per unit area.

The intensity of the dog bark is 10⁻⁵ W/in². The intensity of sound in decibels is given by:

$\beta=10\ dB*log(\frac{I}{I_o} )\\\\Where\ I=Sound\ intensity\ in \ W/m^2, I_o=reference\ sound\ intensity=10^{-12}\ W/m^2\, \beta= sound\ intensity\ in\ dB$