Jerome buys 3 gallons of milk and 2 loaves of bread at the grocery store. Each gallon of milk costs $2 each and each loaf of bread costs $4. How much money does Jerome spend at the grocery store? Write an expression to solve the problem.

A= b/2 because u simplying both sides of equation

21/2 or 5/2

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.