99.4k views
1 vote
HELPPPPPPPPPPPPPPPPPPPPPPPPPPP

HELPPPPPPPPPPPPPPPPPPPPPPPPPPP-example-1
HELPPPPPPPPPPPPPPPPPPPPPPPPPPP-example-1
HELPPPPPPPPPPPPPPPPPPPPPPPPPPP-example-2
HELPPPPPPPPPPPPPPPPPPPPPPPPPPP-example-3

1 Answer

3 votes
Pe=365 Earth days=1 year
Pm=687 Earth days=687/365 ≈1.882 years
1²/(De)³=1.882²/(Dm)³
So (Dm)³/(De)³=1.882²/1²
Dm/De= the cubic root of 1.882²≈1.52
b is the correct answer
User Jodie
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