If a rat grows 1.5 inches a year, how many years will it take the rat to grow to 12.3 inches?

You would do 12.3/1.5= 8.2 years

You divide 12.3 by 1.5 and you'll get 8.2
i hope you under stand how to solve this problem

The answer would be 16

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.