The mean of the data set is 42.
<h3>What is Mean?</h3>
The arithmetic mean is found by adding the numbers and dividing the sum by the number of numbers in the list.
Given:
20, 32, 34, 36, 40, 42, 44, 48, 55, 65
Mean = 20+32+ 34+ 36+ 40+ 42+ 44+ 48+ 55+ 65/10
Mean = 416 / 10
Mean = 41.6
Mean = 42
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Question 1 240/45=5.333333333333
Answer:
The average speed of the baseball is 25 m/s.
Step-by-step explanation:
The average speed is given by:

Having that:
d = 15 m
t = 0.6 s
The average speed of the baseball is:

Therefore, the average speed of the baseball is 25 m/s.
I hope it helps you!