The square of 8100 is the same as 8100 x 8100.
8.5% of 8100= 8.5% * 8100= 0.085 * 8100= 688.5
900
2 x 2 x 3 x 3 x 3 x 3 x 5 x 5 = 8100
1620
72900 ÷ 8100 = 9
900
8100
22 x 34 x 52 =8100
90 x 90 = 8,100
8100
8100
The square of 8100 is the same as 8100 x 8100.
8.6% of 8100= 8.6% * 8100= 0.086 * 8100= 696.6
8.5% of 8100= 8.5% * 8100= 0.085 * 8100= 688.5
8100
A decimal number is simply a way of representing a number in such a way that the place value of each digit is ten times that of the digit to its right. A decimal representation does not require a decimal point. So the required decimal representation is 8100, exactly as in the question.