Sound Intensity: Thresholds of Hearing & Ratio Calculation

[nuclear_nfl]

Homework Statement

Using an intensity of 1 × 10-12 W/m2 as a reference, the threshold of hearing for an average young person is 0 dB. Person 1 and person 2, who are not average, have thresholds of hearing that are β1 = -5.00 dB and β2 = +12.0 dB. What is the ratio I1/I2 of the sound intensity I1 when person 1 hears the sound at his own threshold of hearing compared to the sound intensity I2 when person 2 hears the sound at his own threshold of hearing?

Homework Equations

12 - (-5) = 10 * log(I2/I1)

The Attempt at a Solution

17 = 10 * log(I2/I1)
1.7 = log(I2/I1)
I2/I1 = 10^1.7 = 50.12

I submitted this online and it says it is incorrect. Anyone able to see where I went wrong?

 

[ehild]

I1/I2 is the question.

ehild