A$150 bicycle is on sale at a 20% discount. if there is a 5% sales tax, how much does the bicycle cost in all?

$126 because you have to multiply the $150 by 0.2 then subtract that from 150 then you multiply that by 1.05 for the sales tax. Then you get $126! 

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.