Identify the relationship between 4 and 7 A-Vertical angles
B-Corresponding angles
C-Alternate interior Angles
D-Linear pair
E-Alternate exterior angles

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.

Ci think but i'm not entirely sure so..

The additive identity is 0 because when you add 0 to a number, you get the identical number as an answer.a + 0 = a