The equation of the circle:

where:
(a; b) - coordinates of the center
r - a radius
Use:

We have:
Answer:The center: (-2; 4)The radius: r = 4
Your answer would be a=-6.12
So if Jade makes $306.25 a week and for every hour she works, she makes $8.75, then all you have to do is divide 306.25 by 8.75.
306.25/8.75 = 35 hours should be your answer
Let me know if that doesn't make sense or you still don't understand it :)
Answer:
is this a math question or something?
Step-by-step explanation: