The point (1,-6) lies on a circle and the center of the circle is at the point (1,-9). What is the equation of this circle? A. (x - 9)2 + (y - 1)2 = 9
B. (x - 1)2 + (y + 9)2 = 9
C. (x - 9)2 - (y - 1)2 = 3
D. (x + 1)2 + (y - 9)2 = 9

John makes $10.50 pers hour what expression represens how much he will make if he works h hours

Given that ot =5, xt=12, and ox= 13 is xy tangent to circle o at t? explain.

Monthly water bills for a city have a mean of $108.43 and a standard deviation of $32.09. find the probability that a randomly selected bill will have an amount greater than $155, which the city believes might indicate that someone is wasting water. would a bill that size be considered unusual?