A marathon is a 26.2-mile race that commemorates the run made by a Greek soldier, Pheidippides, that took place in 490 BCE. How many kilometers did he run

The answer is lol i dont know

(6,0) i hope it makes enough sense

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.

Most of them do but everyone doesn’t get exactly the same questions on every quiz so there will also be questions you’ve never had. you can find a lot online though like on quizlet and on here.