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Mathematics, 31.01.2021 21:10 kiannadgarnica

I had some trouble with my astronomy work. I have to solve for a^3. The amounts given are below. The equation is: (M1 + M2) P^2 = 4pi/G(a^3)
M1 = 3.7 Msun star
M2 = 0.8 Msun star
P² = 7.7841 days
4(Ï€)= 12.56
G = 6.67408 × 10^-11 m^3 kg^-1 s^-2
a³ = ?

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