X equals to 48
The work is shown in the picture. I hope this helps.
Answer:
-105197.8
Step-by-step explanation:
4.42 × 10-104.2 × 1010 = -105197.8
Hope this helps!
Just do length x width x height
When you have a negative exponent, you move it to the other side of the fraction to make the exponent positive.
For example:
or 
or y²
So:

Your answer is B
I tried to show all work.