9.3 Scientific notation

• 7.8 x 10^6

• 7.8 x 10^5

• 7.8 x 10^(-4)

• 7.8 x 10^(-5)

• 9.23 x 10^10

• 9.32 x 10^(-10)

• 9.32 x 10^(10)

• 9.32 x 10^(9)

• 12 x 10^9

• 1.2 x 10^10

• 1.2 x 10^9

• 12 x 10^10

• 4 x 10^2

• 400

• 360

• 3.6 x 10^2

• 1.5 x 10^1

• 150

• 2.58 x 10^1

• 2.58 x 10^4

• 1.2348 x 10^3 km/h

• 1.2348 x 10^6 km/h

• 3.43 x 10^5 km/h

• I don't know

Calculate the number of seconds in a year, expressing your answer in scientific notation.

(Number from 1-10 space x 10^power)