When rounding a decimal number to the nearest whole number, we look at the first decimal place. In this case, 10.9 has a 9 in the tenths place. Since 9 is greater than or equal to 5, we round up. Therefore, 10.9 rounded to the nearest whole number is 11.
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109
110
no
109 is a prime number, so 1*109 = 109, but no other whole numbers will work.
No - rounded to three significant figures, 9/109 = 0.0826.