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If a comet has a perihelion of 0.80 AU and an aphelion of 9.1 AU, what is the semi-major axis of the comets orbit? Express t

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As we know, Penihelon = aclre)=0.80 AU aple helion =acite)=9.1 AU ③ eqe 17 eqn2 all-e) fa (ote) = 9.90 AU =) a- de tat axe =9

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