A cross-country runner runs 20 km in 40 minutes. What is his average speed? 5 m/s
.5 m/s
5 m/s/s
O .5 m/s/s

see earlier answer

first thing first of the answer is with technology. second thing second thing is that the big bang theory did not happened u see they say it did but what they dont realize is that like dinasures are still a round they might deny it but they and look at these 12 foot human skelteons they find lets see didnt the bible say something about giants. hope this peace.