Here is an example: 1.123456789 = one and one hundred twenty-three million, four hundred fifty-six thousand, seven hundred eighty-nine billionths
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999,999,999 or with 9 decimal places 999,999,999.999999999
8900000000 in scientific notation is 8.9 x 10^9. This is because we move the decimal point 9 places to the left to make the number between 1 and 10, and then raise 10 to the power of 9 to account for the number of decimal places moved.
0.000000001 in standard form is 1 x 10^-9. This is because the decimal point is moved 9 places to the right to make the number between 1 and 10, and the exponent indicates the number of places the decimal point was moved.
If you mean 9 hundredths then 9/100 = 0.09 as a decimal
Rounded to two decimal places, the square root of 85 is 9.22. Rounded down to the nearest whole number, this is 9.If you square 9, you get 9 x 9 = 81.