For each calculation choose the correct answer written in standard form.

Answer:
Step-by-step explanation:
FOR A
( 7 * 10^5) * ( 3 * 10^2)
= option B that is 21 * 10 ^ 7
For B
( 2 * 10^5) / (4 * 10^2)
= option B that is 5 * 10^2