Find an equation for the circle.Center (18, 21), tangent (touching at one point) to the x-axis
A. (x - 18)2 + (y - 21)2 = 324
B. (x - 21)2 + (y - 18)2 = 21
C. (x - 21)2 + (y - 18)2 = 324
D. (x - 18)2 + (y - 21)2 = 441
Answer: D
Mathematics
You might also like to view...
Provide an appropriate response.Perform the operation and simplify, expressing answer with a positive exponent in lowest terms: 
A. x13/15 B. x3/8 C. x2/15 D. 2x
Mathematics
Graph the equation.r = 5 + 5 sin ?
A. 
B. 
C. 
D. 
Mathematics
Solve the exponential equation. 4x + 4 = 46 - x
A. 1 B. 256 C. 2 D. 0
Mathematics
Use the information given about the angle ?, 0 ? ? ? 2?, to find the exact value of the indicated trigonometric function.sec ? = - 
, csc ? > 0Find sin (2?).
A. 
B. 
C. 
D. - 
Mathematics