Biologists found that the length of a virus is 0.0000403 mm, which is expressed by scientific counting method as_______ The significant number is________ . 0.008905: (1) 001 cm; (2) 0001 cm; (3) Accurate to 0.00001cm

Biologists found that the length of a virus is 0.0000403 mm, which is expressed by scientific counting method as_______ The significant number is________ . 0.008905: (1) 001 cm; (2) 0001 cm; (3) Accurate to 0.00001cm

It is expressed as 4.03 * 10 ^ (- 5) by scientific counting method, and the significant number is 4.03
1)0.009
2)0.0089
3)0.00891

Biologists found that the length of a virus is about 0.000043 mm, which should be 0.000043 mm by scientific notation______ ．

000 043 = 4.3 × 10-5, so the answer is: 4.3 × 10-5

The length of a virus is about 0.0000403 mm, which is expressed by scientific notation

4.03 times 10 to the - 5th power