How does the precision of each instrument used in the lab affect the number of significant digits used to evaluate density?

for step 7 table c on the lab "newtons law of action"   the average time it took the car to travel .25 meters   was 1.92 seconds.

the average time it took the car to travel 0.50 meters was 2.61 seconds

hope this : )

the answers are

c and c

the answer is symmetrical : )