The number three million is 3 followed by six zeroes.
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Six (1 000 000)
1.9 million is 1,900,000 so the answer is 5. there are 6 0s in 1 million and the .9 takes off another one.
None. You could write is as 1,000 kilowatt and have 3 0s or 1,000,000 watts (6 0s) or 1,000,000,000 milliwatts (9 0s) etc.
3 0s to the left are insignificant and 0s that aren't right after the decimal or between other significant figures are insignificant
shamaelThere are no 0s in 1 ton.A ton is occasionally used to represent 100 (runs in cricket, for example) and in that context, it has 2 0s.