Answer:
Step-by-step explanation:
(2x+4)° + 42° = 180°
x = 67°
Exterior angles are complementary to the opposite interior angle
3926/13 =302 but I'm not 100% sure where you went wrong do you have any work?
You gave us the speed and the frequency, and you need the wavelength.
You were also nice enough to remind us that (fqy)x(lng) = speed.
So . . . F x W = 343 m/s
Divide each side by F :
W = (343 m/s) / F
W = (343 m/s) / (240 / s)
W = (343/240) m
<em>W = 1.429 meters</em>
B is the answer because you have to math it