Ok so i need help with this the image is below

What is the gcf of 20c^3-5c^4+30c^6

Monthly water bills for a city have a mean of $108.43 and a standard deviation of $36.98. find the probability that a randomly selected bill will have an amount greater than $173, which the city believes might indicate that someone is wasting water. would a bill that size be considered unusual?

Look at the figure xyz in the coordinate plane. find the perimeter of the figure rounded to the nearest tenth.