The average heights of four samples taken from a population of students are shown in the table. Which of these is most likely closest to the average height
of the population?
Sample size
Average height
(Inches)
10
63
20
54
30
57
40
59
A. 54
B. 57
C. 59
D. 63

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.