Respuesta :

Answer:

Idk what the answer choices is if there is any

Scientific notation is 8.4 * 10^2

expanded form 840

Answer:840

Step-by-step explanation:

you need to first multiply 10x10 then when u get the result which is 100 u move the decimal point by the number of zeroes there is in the 100 and u move it two spaces to the right and then just add a zero