-12 -8 -6 -4 -3 2 3 4 6 8
Answer:
10^9 is 10 × 10^8, since 10^9= 10×10×10×10×10×10×10×10×10
Answer:
51
Step-by-step explanation:
A = Surface area of the Earth = 
Total number of people on Earth = 7.594 billion as of 2018 = 
We need to find the number of people living in each square km of land area.
So, we need to divide the number of people by the land area of the Earth.



So, 51 people will inhabit each square km of land area.
It is probably best to measure a volume of this size in Liters. This is a metric unit. There are 1000 liters in one cubic meter.
You need to find the common primes...
18=2*3*3 and 72=2*2*2*3*3 so they have 2*3*3 in common and
2*3*3=18
So 18 is the greatest common factor.