Question

write the number in scientific notation.
840,000 = \boxed{8.4 \times 10^{5}}

Explanation:

Step1: Recall scientific notation rules

Scientific notation is in the form \( a \times 10^n \), where \( 1 \leq |a| < 10 \) and \( n \) is an integer.

Step2: Analyze the number 840,000

To get \( a \) between 1 and 10, we move the decimal point 5 places to the left: \( 840000 = 8.4 \times 10^5 \) (since moving the decimal 5 places left means multiplying by \( 10^5 \)).

Answer:

\( 8.4 \times 10^5 \)