Question

Which of the following is the same as 8.4 × 102 ?

a. 840
b. 84
c. 8,400
d. .84

Answer 1

Move the decimal 2 places to the right

8.4 becomes 840

Answer 2

Answer: The correct option is (a). 840.

Step-by-step explanation: We are given to select the number that is equivalent to the following decimal number :

`N=8.4* 10^2.`

We know that

10 to the power positive number n means there are n zeroes after the digit 1.

Therefore, for the given decimal number, we get

`N=8.4* 10^2=8.4*100=84*10=840.`

Thus, the required same number is 840.

Option (a) is CORRECT.