Which of what? Apologies please list the following so I can help.
Answer:
a) 
b) a= 1.79 m/s²
θ = 41.98⁰
Explanation:
arc radius = 12 m
constant speed = 4.00 m/s
(a) centripetal acceleration


= 1.33 m/s²
(b) now we have given

now,


a= 1.79 m/s²
direction


θ = 41.98⁰
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
Because the sound vibrations traveled faster through the solid metal and slower through the gassy air.