The formula B=10log(i/i0) is used to find the sound level, , in decibels (dB), of a sound with an intensity of I. In the formula, represents the smallest sound intensity that can be heard by the human ear (approximately ). What is the sound intensity of a noise that is 130 dB?

The sound intensity is
.

The Answer is 10 watts/meter^2.

Step-by-step explanation:

Substitute 130 for B.

Substitute 10^-12 for i0.

I am not going to write absolutly everything because I would be here for days lol

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step-by-step explanation:

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the largest number of the four options is 1.8 x 10-2

you have it in scientific notation.

1.80 x 10-6   = 0.00000180

1.80 x 10-4   = 0.000180 (bigger, or "less small", than the former one)

so

1.8 x 10-2       = 0.0180. as you see. the "less small", or the biggest one of them all.

as you have negative exponent, it means you are dividing 1.8 by 100 (i.e. moving the dot towards left, two times).

if you had positive exponent for the scientific notation, power of tenths, you would be multiplying times 100 (moving the dot towards right) as below:

1.8 x (10)2 = 180

so. if you have negative exponent in scientific notation, move the dot toward left. if it is positive, toward right as many times the exponent tells you.