Answer:
44,286
Step-by-step explanation:
The rule is multiplying by -3.
The sequence goes -3, 9, -27, 81, -243, 729, -2187, 6561, -19683, 59049
Add all of those up and you get 44,286
The scale for the second values is 56/8 = 7
C = 3 x 7 = 21
C= 21
The Order of magnitude for the population of the world is not five