The publisher chooses to have front and back covers with a thickness of 1/3 of an inch instead.

Write an equation that represents the NEW total width of the book, 1/3, for every 100 pages of paper, x.

The only number less than 8 that can equal 12 would be 6, 36 is the dividend

Here is my answer, i'm sorry if you didn't understand my explanation

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.