An ellipse has vertices at (±5, 0) and foci at (±4, 0). What is its eccentricity?
Q1. An ellipse has vertices at (±5, 0) and foci at (±4, 0). What is its eccentricity?
Answer: 0.8
Explanation: Eccentricity e = c/a = 4/5 = 0.8. c = distance from center to focus.