Answer:
D. -9
Step-by-step explanation:

If the probability of spinning an A once is 1/12, then the probability of spinning an A 3 times is 3 × 1/12.
3 × 1/12 = 3/36
Simplify
3/36 = 1/12
Wavelength denotes the time for one cycle of a periodic process
Answer:
B
Explanation:
87/100 a b a = negative 13; b = negative 13 a = negative 13; b = 13 a = 13; b = negative 13 a = 13; b = 13 = x
Hope this helped!
-Toshino