The class is about heat, waves, and light. The website wants exactly the perfect answer and in the same metric system units that are stated on the calculators that are on the picture for the question, if not, it'll mark it wrong.

Set 18 Problem 4 A teacher stands in a hallway inside a building well back from an outside doorway 0.79 m wide. and blows a whistle of frequency 702'. Hz. Ignoring reections, estimate the smallest angle (with respect to a line straight out the doorway) at which it is not possible to hear the whistle clearly on the playground outside the doorway. Assume the temperature is 2|] \" Ct How is the wavelength related to the frequency of sound