If the sound intensity level of a plane engine is 140 dB above the threshold of hearing. The sound intensity of that engine is? (answer in W/m2)

A noisy factory machine produces a sound intensity of 1.00 x 10-5 W/m2 when measured 10 m from the machine. Assume that the sound spreads out uniformly into 3 dimensions for this set of questions. What is the sound power output of the machine? (Give your answer in mW.) What is the decibel level of the machine at 10 m? At what distance is the decibel level equal to 55 dB? (Give your answer in m.)

The intensity of the sound coming from a piece of machinery was measured 1.2 m from the machine and found to be 115 dB. What is the intensity for someone 10 ft away from the machine?

The record for the world's loudest burp is 109.9 dB, measured at a distance of 2.5 m from the burper. Assuming that this sound was emitted as a spherical wave, what was the power emitted by the burper during his record burp?