The water level of a lake is normally 3 feet above sea level and has a depth of 32 feet. During a flood, the water
level rose 5 feet above normal. After 2 months with no
rain, the water level dropped 7 feet. How would you describe
the present water level?

The answer is 10. sorry i was wrong the 1st time

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.