0
18 feet tall, when rounded to the nearest hundred feet, is 0 feet. Rounding to the nearest hundred considers the value of 18 in relation to the nearest hundred, which is 0 and 100, and since 18 is closer to 0, it rounds down.
It is 300 when rounded to the nearest hundred
916 rounded to the nearest hundred is 900
0
It is already rounded to the nearest hundred thousandths. Rounded to the nearest thousands would be 87.381.
0
0
0
678 is rounded nearest hundred is 700
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0
0