The equation of a circle is: (x-h)^2 + (y-k)^2 = r^2 where (h,k) is the location of the center and r is the radius. So we need to find h, k, and r. The center is given as (5,-4) so h = 5 and k = -4: (x-5)^2 + (y-(-4))^2 = r^2 (x-5)^2 + (y+4)^2 = r^2 So we need to find r. Use the distance formula to find the distance between (5,-4) and (-3,2): r = [(5-(-3))^2+((-4)-2)^2]^1/2 r = [8^2 + (-6)^2]^1/2 r = [64 + 36]^1/2 r = 100^1/2 r= 10 The final equation is: (x-5)^2 + (y+4)^2 = 10^2
The answer would be 15 because if you take the 320 and subtract the 200 dollars in commissions, then your left with 120. You then divide the 120 by 8, and you get $15 per hour
