Can somebody please help me I’ve been asking for help for the longest and no one is trying to help me

Evaluate-27 ^4/3/8 a) - 81/16 b) 81/16 c) 16/81

The weight v of an object on venus varies directly with its weight e on earth. a person weighing 120 lb on earth would weigh 106 lb on venus. how much would a person weighing 150 lb on earth weigh on venus?

What is the similarity ratio of a cube with volume 729m^3 to a cube with volume 3375 m^3