A) 5
Half-life is the time it will take for a quantity to reduce to half its initial value. In this case, uranium will undergo radioactive decay, and after 700 mil years, 5 of the 10 uranium atoms will have decayed.
Answer:
I think its d or b but I am not sure learned this last year
Show how little things make up bigger things and a microscope or images of microscopic things.
