Solution: The orbits of stars, planets, comets, asteroids, and satellites all have the
Chapter 10, Problem 69(choose chapter or problem)
The orbits of stars, planets, comets, asteroids, and satellites all have the shape of one of the conic sections. Astronomers use a measure called eccentricity to describe the shape and elongation of an orbital path. For the circle and ellipse, eccentricity e is calculated with the formula e = c d , where c 2 = 0 a2 - b2 0 and d is the larger value of a or b. For a hyperbola, eccentricity e is calculated with the formula e = c d , where c 2 = a2 + b2 and the value of d is equal to a if the hyperbola has x-intercepts or equal to b if the hyperbola has y-intercepts. Use equations AH to answer Exercises 6170.A. x2 36 - y2 13 = 1 B. x2 4 + y2 4 = 1 C. x2 25 + y2 16 = 1 D. y2 25 - x2 39 = 1 E. x2 17 + y2 81 = 1 F. x2 36 + y2 36 = 1 G. x2 16 - y2 65 = 1 H. x2 144 + y2 140 = 1The eccentricity of a parabola is exactly 1. Use this informationand the observations you made in Exercises 66, 67,and 68 to describe a way that could be used to identify thetype of conic section based on its eccentricity value.
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