The solution is in the attachment
Answer:
Aluminum
Explanation:
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Explanation:distance-time =speed
a,V =s/t
V=2m/2s
V=1m/s
b,v=s/t
V=80m/40s
V= 2m/s
The average speed is 2m/s
The answer is B complimentary
C Hypothesis. It is the correct answer.