Would somebody me with this problem and a couple more

Use the standard equation of a circle with center at (h,k) and radius r:

(x-2)^2 + (y+4) = 3^2

I have helped you several times already with this type of problem.  I'd love to see you demonstrate your growing understanding through sharing some of your own work instead of just asking for answers.

Is a for each hour he works,his earnings go up by $4