Please help

The equation (x – 5)2 + (y – 7)2 = 81 models the position and range of a cellular phone tower. What is the range of the tower?

A: 18 units

B: 9 units

C:27 units

D: 81 units

Hurry and answer this! circle x with a radius of 6 units and circle y with a radius of 2 units are shown which steps would prove the circles similar? translate the circles so they share a common center point, and dilate circle y by a scale factor of 4. translate the circles so the center of one circle rests on the edge of the other circle, and dilate circle y by a scale factor of 4. translate the circles so they share a common center point, and dilate circle y by a scale factor of 3. translate the circles so the center of one circle rests on the edge of the other circle, and dilate circle y by a scale factor of 3

Need ! discuss how to convert the standard form of the equation of a circle to the general form. 50 points

Solve -.016x= -16. need solving this