<---replaces #7--->The figure below is a net for a triangular prism. Side a = 16 feet, side b = 8 feet, side c = 21 feet, side d = 18 feet, and side e = 16 feet. What is the surface area of this figure?

Do you mean conversion factor?

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.