Ahealthy 38 year old female patient was examined by her family physician during a routine preventive exam. the patient has no specific problems, but is hiv positive without any other symptoms. icd-10 code:

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?