bommiegauthier bommiegauthier 28-09-2016 Mathematics contestada The average weight of a mature human brain is approximately 1400 grams. What is the equivalent weight in pounds? Use the conversion equivalency 1 kilograms (kg) = 1000 grams (g) and 2.20 pounds (lb) = 1 kg. a.)5.11 lb b.)3.08 lb c.)636 lb d.)25.8 lb