Is this correct?? if not pls tell me the correct answer

Pls the last one and it has to be like number 6

For a particular set of atmospheric conditions, the function y z 349 models the frequency, y, in waves per second, of sound waves with a wavelength of y meters a note played on a guitar has a frequency of 440 waves per second. to the nearest centimeter what is the wavelength of the note? centimeters

Suppose you have a 40 percent chance of getting a job offer from your first choice firm, a 40 percent chance of getting a job offer from your second choice firm, and a 16 percent chance of getting a job offer from both firms. what is the probability that you will get a job offer from either firm?