Question

Please help me with finding Sound "I havequiztomorrow.?

Please help me with finding Sound "I havequiztomorrow.?
Assume that the speed of sound in air is 343 m/s, at 20C,unlessotherwise noted.

2. You are listening to an outdoor concert on a day whenthetemperature is 0C. The sound of a wavelength of .490 m isemittedby a flute on the stage 125 m from where you arestanding.
a) What is the time elapsed before you hear the sound emittedfromthe stage?
b) What is the frequency of the sound?

3. The engine of a jet plane taking off produces a sound levelof140 dB, and the sound wave has a pressure amplitude of 200 Pa.Abaggage handler working next to a jet plane that is taking offiswaring specially designed hearing protectors that reduce thesoundlevel entering his ear by 40 dB. What is the pressureamplitude ofthe sound wave entering his ear?

**Please show your work, so I can understand how to do this inthefuture.
Please answer 1 or both...