Usain Bolt ran 400 meter at the same average speed that he can ran the 200 meter. How long would it take him to run 400 meters? round your answer to netherworld nearest hundredth of a second

Julia chooses a card at random from her set of cards. what is the probability that the card is labeled cat or hamster?

Two cars which are 40 miles apart start moving simultaneously in the same direction with constant speeds. if the speed of the car which is behind is 56 mph and the speed of the other car is 48 mph, how many hours will it take for the car which is behind to catch up the car ahead of it?

What is r i 4.5+10r=-6.5 with work pls