Alek is using synthetic division to divide 23 +4.02 43x – 10 by 3 –5.
Which answer is correct?
51 -4 43 -10
5 5 240
1 1 48 230
51-4 -43 -10
5
5 -190
1 1 -38 -200
5 1 4 -43 -10
O 5 45 10
19 20
-51 4 -43 -10
-5
O
5 190
1 -1 -38 180

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.