Transcript A circle with center (–3,4) is tangent to the x-axis in the standard (x,y) coordinate plane.

A circle with center (–3,4) is tangent to the x-axis in the standard (x,y)
coordinate plane. What is the radius of this circle?
A. 3
B. 4
C. 5
D. 9
E. 16
The correct answer is B.
Explanation:
If the circle with center (-3,4) is tangent to the x-axis, the point of
tangency is (-3,0) and the distance between these points is 4, so the
radius is 4.