Final answer:
To write (1.4 × 10⁹) in standard notation, you need b) 9 zeros.
Step-by-step explanation:
To write (1.4 × 10⁹) in standard notation, you need to count the number of zeros after the 1.
Since 10⁹ represents 1 followed by 9 zeros, you will need a total of 9 zeros to write (1.4 × 10⁹) in standard notation.
Therefore, the correct answer is b) 9.