Escitalopram is an oral drug that is used for treating depression and generalized anxiety disorder. Chemically, escitalopram is similar to citalopram . Both are in a class of drugs called selective serotonin reuptake inhibitors (SSRIs), a class that also includes fluoxetine , paroxetine and sertraline .
1 A circle is all of the points that are a fixed distance, known as the radius, from a given point, known as the center of the circle. 2  Explore the standard equation of a circle using the applet below (Go here for a larger version).
Question from Raymund, a student: Find the radius if the center is at (0, -5) and one point on the circle is (2,3). Thanks. Hi Raymund. The standard form of the equation of a circle is. (x-x0) 2 + (y-y0) 2 = r 2. where (x0, y0) is the center of the circle. and r is its radius.So you can substitute in (0, -5) for the center (x0, y0) and you will get an equation involving x, y and r. You are told that the point (2, 3) is on the circle, which means it solves the equation. So now substitute (2, 3) in for (x, y) in your equation and you will be able to find the radius r.i Raymund. The standard form of the equation of a circle is. (x-x0) 2 + (y-y0) 2 = r 2. where (x0, y0) is the center of the circle. and r is its radius. So you can substitute in (0, -5) for the center (x0, y0) and you will get an equation involving x, y and r.