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There are three. The 4, the 5 and the zero in between. The two last zeros serve only to properly space the decimal point which, in this number, is implied.

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8y ago
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chupas albert

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2y ago
chupas
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15y ago

There are three significant figures (405).

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8y ago

3 significant figures.

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Wiki User

8y ago

2 significant figures.

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7y ago

4 of them.

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Wiki User

10y ago

three

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Wiki User

13y ago

Four

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Q: How many significant figures are there in measurement 40 500?
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