Rewrite using standard notation: 354.2*10^-2

How do you do this geometry problem

Fiona and her friends are playing a game by guessing where a coin will land when it is randomly dropped inside the square shown below. fiona guesses that the coin is likely to land in the blue area. which explains whether or not fiona is correct and why?

Ineed if you could explain and give me the answer you! this needs done