After 56 days, a 4.0-g sample of phosphorus-32 contains only 0.25 g of isotope. Based on this data,
what is the half-life of phosphorus-32?

true

hope that

i think it's c. if you look search electronic symbol on google and then click on wiki it shows you a

the answer is b because, investigating whether another species of moth also drinks tears might be interesting, but it would not directly explain why this species of moth does.

to explain why this species of moth drinks tears, the scientist could ask: "what nutrients that moths need are in elephant tears? "

the scientist could experiment with moth repellent or oter ways to keep the moths away, but that would not answer his original question.