just divide salt/fresh:
(3*10^20)/(6*10^18)
= (3/6)*10^(20-18)
= 0.5*10^2
= 50
There are about 3x10^20 gallons of salt water on the earth, while there are about 6x10^18 gallons of fresh water. About how many times the amount of fresh water is the amount of salt water?
A. 2 TIMES
B. 50 TIMES
C. 200 TIMES
D. 500 TIMES
1 answer