Round off the measurement 0.002 015 5 m to three significant figures.

0.002

Explanation:

The significant figures of a number are digits that are meaningful in trying to resolve a given value. These are actually digits that carry meaning in a given number.

Let s look at  0.002, the zero before the decimal  point carries no real meaning in the number. However, the zeros that precede 2 are all meaningful because the occupy the tenth and hundreth place values.

Hence, there are three significant figure in  0.002.

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