I need help with number 3

3. The frequency of the wave is 3 Hz.

Explanation:

3. Determination of the frequency of the wave.

Frequency is simply defined as the number of complete circle or oscillation made in 1 seconds. Mathematically, it can be expressed as:

f = n / t

Where:

f => is the frequency.

n => is the number of circle.

t => is the time.

With the above formula, we can obtain the frequency of the wave as follow:

Number of complete circle (n) = 3

Time (t) = 1 s

Frequency (f) =?

f = n / t

f = 3 / 1

f = 3 /s = 3 Hz

Therefore, the frequency of the wave is 3 Hz

54 degrees incident angle = reflected angle

angle is from normal turned to line of ray

can u provide the graph and if its not possible

then i can tell u the segment where the

average time interval starts degrading is the segment where the car is slowing down