What is the answer to 5/8 . 2/7 and what does the dot stand for the dot is actually a little higher

What is the value of x? enter your answer in the box. (cm)

If a flying disk is 139 meters in the air and travels at an average of 13 m/s how long is it in the air

Five friends found a dollar on the ground and decided they each should get 1/5 of it. what amount of money will each friend get? $0.05 $0.20 $0.30 $0.80