E. The object’s average speed during the time interval from 1 s to 3 s is 13.5 ft/s.
B. An estimate of the object’s instantaneous speed at t = 3 seconds is 5.4 m/s.
<h3>What is average speed?</h3>
The average speed of an object is the ratio of total distance traveled by object to the total time of motion of the object.
position of the object at 1 second = 2.7 ft
position of the object at 3 seconds = 24.3 ft
total distance traveled by the object = 2.7 ft + 24.3 ft = 27 ft
total time = 3 - 1 = 2 seconds
average speed = 27 ft / 2 s
average speed = 13.5 ft/s
<h3>What is instantaneous speed?</h3>
This is the speed of the object at a specified time.
speed = distance/time
speed at 3 seconds = 16.2 m / 3 s
speed = 5.4 m/s
Thus, the object’s average speed during the time interval from 1 s to 3 s is 13.5 ft/s.
An estimate of the object’s instantaneous speed at t = 3 seconds is 5.4 m/s.
Learn more about average speed here: brainly.com/question/4931057
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