Jason makes 2centiliters of medicine. how many milliliters is this?

Know KHDBDCM. that's the order of prefixes. you start at Cent and move right once to Milli.  So you move the decimal the same exact way in the number. So 2 centiliters is actually 20 milliliters.

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.