Insulin is a protein that is used by the body to regulate both carbohydrate and fat metabolism. a bottle contains 375 ml of insulin at a concentration of 40.0 mg/ml . what is the total mass of insulin in the bottle?
express your answer numerically in milligrams.

Ihave no idea how to solve these. plus there's another question that is 2) a 10 kilogram meteorite is collected in space and brought back to earth. it is composed of 1.25 kg of uranium-238 and 8.75 kg of lead-206. how many u-238 half lives have passed? what is the approximate age of the meteorite?