Question

What is 0.000000685 written in scientific notation?
Explain why.

685×
10
−9

68.5×
10
−8

6.85×
10
−8

6.85×
10
−7

Answer 1

$685 x 10 = 6850 Nine is negative The answer would be be with a deciamal The answer is : 685× 10 −9$