Calculate the area enclosed by the curve x^2 + y^2 - 10x + 4y - 196 = 0.
Problem
Calculate the area enclosed by the curve $x^2 + y^2 - 10x + 4y - 196 = 0$.
| A. 15π | C. 169π |
| B. 13π | D. 225π |
Standard Equation of Circle
A circle has an equation of x^2 + y^2 + 2cy = 0. Find the value of c when the length of the tangent from (5, 4) to the circle is equal to one.
Problem
A circle has an equation of $x^2 + y^2 + 2cy = 0$. Find the value of $c$ when the length of the tangent from (5, 4) to the circle is equal to one.
| A. 5 | C. 3 |
| B. -3 | D. -5 |
What is the radius of the circle x^2 + y^2 - 6x = 0?
Problem
What is the radius of the circle $x^2 + y^2 - 6x = 0$?
| A. 6 | C. 4 |
| B. 9 | D. 3 |
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