Posted by **Aimee** on Friday, May 27, 2011 at 12:55am.

Log functions:

A new car has an interior sound level of 70 dB at 50 km h. A second car, at the

same speed, has an interior sound level that is two times more intense than that

of the new car. Calculate the sound level inside the second car.

- Math -
**Henry**, Saturday, May 28, 2011 at 3:55pm
NEW CAR:

10LogN = 70db,

Divide boh sides by 10:

LogN = 7,

N = 10^7.

2ND CAR:

N = 2*10^7,

10Log(2*10^7) = 10*(0.3010+7) = 73db.

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