Answer:
By visiting other households with cats.
Explanation:
This will give Brian a variety of other houses and determine if it is truly cats or just alleries from other items. This is the most direct way to get Brian the answer he is looking for.
Answer:
me no speak espanol fella
Answer:
She should have first notified the teacher.
Answer:

Explanation:
Hello there!
In this case, it possible to use the Rydberg equation in order to calculate the wavelength for this transition from n=3 to n=2 as shown below:

Thus, we plug in the corresponding energy levels and the Rydberg constant to obtain:

Best regards!