9000
The square of 8100 is the same as 8100 x 8100.
8.5% of 8100= 8.5% * 8100= 0.085 * 8100= 688.5
8.6% of 8100= 8.6% * 8100= 0.086 * 8100= 696.6
100.
55
10000.
18
8100
8100 is.
That would be 16.
8100 is not a fraction and its decimal form is 8100, exactly as in the question.