–5× 10^–12 is the required number that is written in the scientific notation. Option B is corect.
GIven that,
Which number is written in scientific notation is to be determined from the option given,
What is arithmetic?
In mathematics, it deals with numbers of operations according to the statements.
What is scientific notation?
Scientific notation can be represented as a * 10^b and ae+b.
1) 0.84 × 106 - it's not a scientific notation
2) –5× 10^–12 - it is a scientific notation
3) 3.4 × 1002 - it's not scientific notation
4) 7.8 × 10–5 - it's not a scientific notation
Thus, –5 × 10 ^ –12 is the required number that is written in the scientific notation. Option B is correct.
Learn more about arithmetic here:
brainly.com/question/14753192
#SPJ2
