Answer
The answer is below.
Work Step by Step
a) We know that the amplitude is the number in front of the cosine, so it is $1.3 \ cm$.
b) $ \lambda= \frac{2\pi}{.69}=9.11\ cm$
c) Using the equation, we find $\omega = 31s$.
Period equals 2 times pi divided by omega. This gives: $ T = \frac{2\pi}{31}=.2s$
d) $v=\frac{\omega}{k}=\frac{31}{.69}=45\ cm$
e) Negative x direction
