3 years ago

It took Perla 8 games to score 30 points.At that rate,how many games will it take her to score 45 points?

Mathematics

1 answer:

BARSIC [14]3 years ago

4 0

Answer:

I am pretty sure you can set up a proportion.

12 games is the answer

Step-by-step explanation:

8 X

_ * __

30 45

8*45=30x

360=30x

x=12

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The intensity of sound which the decibel level of the sound measures 156 is 3.981 × 10³ W/m²

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Since we require I, making I subject of the formula, we have

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$\frac{I}{I_{0} } = 10^{\frac{dB}{10} } \\I = I_{0} 10^{\frac{dB}{10} }$

Substituting the values of the variables into the equation, we have

$I = I_{0} 10^{\frac{dB}{10} }\\I = 10^{-12} 10^{\frac{156}{10} }\\I = 10^{-12} 10^{15.6}\\I = 10^{15.6-12} \\I = 10^{3.6} W/m^{2}$

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