Find x. Just type the number and how you know please

Look at this pattern ; 1,4,9, number 10000 belongs in this pattern . what’s the place of this number?

Non-euclidean geometry was discovered when, in seeking cleaner alternatives to the fifth postulate, it was found that the negation could also be true a. true b.false

Walking at a constant rate of 8 kilometers per hour, juan can cross a bridge in 6 minutes. what is the length of the bridge in meters?