Answer those 5 questions

1. A sound has an intensity of 3.00 x 10 W/m?. What is the sound level in dB? 2. A noise-level meter reads the sound level in a room to be 85.0 dB. What is the sound intensity in the room? 3. Two sound waves have intensities of 3.60 x 10 W/m and 2.83 x 102 W/m?. What is the difference in their intensity levels? 4. Find the ratio of the intensities of the two sounds if one is 8.0 dB louder than the other. 5. One typist typing furiously in a room gives rise to an average sound level of 60.0 dB. What will be the decibel level when three equally noisy typists are working?(The combined sound has an intensity I = /1 +12)