To solve the given question, we need to calculate [tex]\( 8.4 \times 10^2 \)[/tex].
1. Understand the Exponent:
- [tex]\( 10^2 \)[/tex] means 10 raised to the power of 2, which is 100.
2. Multiply by the Base Number:
- Now, we need to multiply 8.4 by 100.
3. Perform the Multiplication:
[tex]\[
8.4 \times 100 = 840
\][/tex]
Thus, the value [tex]\( 8.4 \times 10^2 \)[/tex] is equal to 840.
Therefore, the correct choice is:
B) 840
