6. Convert 0.020 kg of tin (Sn) to mg of Sn.

gram=Kg*1000

Explanation:

g=0.020*1000

Gram=20

i'm assuming that the correct answer is indeed the first one/ "a"..

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 : )