I just completed this test and got a %100 on my first try, so I know for sure that the answer is 532m^2
Also for the rest of the 10 questions.
1) 0.5, a reduction
2) more than one
3) 168.6
4)x=83
5) 17
6) 23.42cm
7)12.56cm^2
8)50.24
9)9.81
I might have different questions than you but those were all my answers.
I hope this helps. : )
