Positive exponent? An index would imply that the base, x, had a fractional exponent.
My Dear Aunt Sally used to say, "If there's a negative exponent in your face, then flip your base!"
In other words, if the exponent is negative, take the reciprocal of the base, x →

and change the exponent to positive.
Therefore:

I have cross the fraction bar line change the exponent sign.
Answer:

Step-by-step explanation:
GIVEN: A bag contains
red
green
orange and
purple candies, without looking Ann pulls one piece of candy out of the bag.
TO FIND: what is the probability that she pulls out a purple piece of candy.
SOLUTION:
Total number of candies in the bag 
Total number of purple candies in the bag 
Now,
Probability that Ann pulls out a purple piece of candy

putting values,


Hence, the probability that she pulls out a purple piece of candy is 
Answer:
Pretty sure it's Undefined:)
Step-by-step explanation:
Answer:
9.0625%
Step-by-step explanation:
It increased from 320 to 349
This is a percent INCREASE.
320 is the "old" value and 349 is the "new" value.
We find percent increase by the formula:

Where old is 320 and new is 349. Lets substitute and find the increase (percentage):

The percentage increase is 9.0625%