2 years ago

Chad bought a pair of jeans that cost $54, but his total was $58.32 due to the

Mathematics

1 answer:

Dima020 [189]2 years ago

5 0

Answer:

Step-by-step explanation:

58.32-54= 4.32

8% of 54 is 4.32

54+4.32= 58.32

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2 years ago

What is the decibel level of the radio with intensity 10−7 watts per square inch? Use a logarithmic model to solve.

BaLLatris [955]

Answer:

$D = 50$

Step-by-step explanation:

Given

$I = 10^{-7}W/m^2$ --- Intensity

Required

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This is calculated as:

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Where:

$I_n =$ The threshold intensity

$I_n =1 * 10^{-12}W/m^2$

So, we have:

$D = 10 * log(\frac{I}{I_n})$

This gives:

$D = 10 * log(\frac{10^{-7}W/m^2}{1 * 10^{-12}W/m^2})$

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Apply law of indices

$D = 10 * log(10^{-7--12})$

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Apply law of logarithm

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So, we have:

$D = 10 * 5 * log(10)$

$log(10) =1$

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$D = 10 * 5 *1$

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<em>Hence, the decibel level is 50</em>

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2 years ago

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Lelechka [254]

Answer:

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3 years ago

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aleksley [76]

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