Answer:
160m/s
Explanation:
The speed of a wave is related to its frequency and wavelength, according to this equation:
v=f ×λ
There are no inaccurate items on the list you provided.
And what does 'the following" mean anyway ?
Answer: 2.74
Explanation:
We can solve this problem using the stopping distance formula:

Where:
is the distance traveled by the car before it stops
is the car's initial velocity
is the coefficient of friction between the road and the tires
is the acceleration due gravity
Isolating
:

Solving:

This is the coefficient of friction