CAN SOMEONE HELP PLEASE I'M WORKING ON LIKE 3 OTHER ASSIGNMENTS PLEASE I CAN'T FAIL THANK YOU GUYS SO MUCH

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?

Which of the following molecules can be broken down into simple sugars? a. nucleic acid b. protein c. lipid d. carbohydrate

What are ways that ordinary people can to keep antibiotic resistance from getting worse?