-4 for the first one and 2/3 for the second
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
Answer:
28.1%
Step-by-step explanation:
Population increased by (561000-438000)=123000
rate of increase
= (123000/438000)*100
=28.08
=28.1
The value of x is 13 for the first attachment.