Question

What is 0.000000986 in scientific notation? ____x10---

Answer 1

It's going to be a negative exponent, since the number is less that 1.
move the decimal to where 986 is more than one but less that 10.
9.86X10^-7

Answer 2

$0.000000986 = 986 \times 10^{-9}=\boxed{ 9.86 \times 10^{-7}}$