Answer: a. Frequency. 20, 4, 3, 1, 1, 0, 1
Explanation:
Interval(Height in feet) - - - - - - - - frequency
14000 - 14999 - - - - - - - - - - - - - - - 20
15000 - 15999 - - - - - - - - - - - - - - - 4
16000 - 16999 - - - - - - - - - - - - - - - 3
17000 - 17999 - - - - - - - - - - - - - - - 1
18000 - 18999 - - - - - - - - - - - - - - - 1
19000 - 19999 - - - - - - - - - - - - - - - 0
20000 - 20999 - - - - - - - - - - - - - - 1
Frequency : (20, 4, 3 1, 1, 0, 1)
Answer:
The answers can be found attached.
At speeds over 30 mph, you should maintain a following distance of at least <u>three full seconds</u> behind the vehicle ahead of you.
As a general rule and common sense at a speed of 30 mph you can leave three full seconds so that you can achieve a prudent distance between the car you are driving and the car in front in order to be able to perform some kind of maneuver if an accident or unforeseen event occurs.
To count the full three seconds you can use the technique of counting the Mississippis as follows: Mississippi one, Mississippi two, Mississippi three.
<h3>What is an accident?</h3>An accident is an unexpected event that generally causes damage, injury or negative consequences.
Learn more about accident at: brainly.com/question/28070413
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