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:
Step-by-step explanation:
d = 2
arc length of semicircle = ½×circumference = ½×πd = π
perimeter of semicircle = π + d = π+2
Answer:
3 boxes
Step-by-step explanation:
because 3 times 9 is 27.
Answer:
130
Step-by-step explanation:
The answer c, because they got 9 out of 15 flips being heads. This probability is 0.6. The other answers are not accurate.