Pi belongs to which number set? What is the value of pi to the hundred-thousandths place?
Who was the first person to theoretically calculate pi?

Pls someone answer these ASAP

Atrain leaves little? rock, arkansas, and travels north at 90 kilometers per hour. another train leaves at the same time and travels south at 80 kilometers per hour. how long will it take before they are 680 kilometers? apart?

Micheal is 4 times as old as brandon and is also 27 years older than brandon. how old is micheal

Two years ago a man was six times as old as his daughter. in 18 years he will be twice as old as his daughter. determine their present ages.