The amount of tears in the room (denoted by ttt) can be defined as a function of the number of people present in the room (denoted by PPP), the number of chopped onions in the room (denoted by OOO), and the deliciousness of the onions (denoted by DDD) using this formula: t =3\cdot \dfrac{P\cdot O^3}{D^2}t=3⋅ D 2 P⋅O 3

Planet earth has a mass of 5.9726x10²⁴ kg.then: 5.9726x10²⁴ kg=100% of the total earth mass.if the water´s mass=5x10-4 % of the total mass, we can solve this problem by the rule of three.5.9726x10²⁴ %*10⁻⁴ %x=(5.9726x10²³ kg)(5*10⁻⁴  %) / 100 %=2.9863x10¹⁹ kganswer:   the mass of the planet´s water would be   2.9863 x 10¹⁹ kg.

Ithink it’s c i’m not so sure but if i’m wrong i’m sorry