DESPERATE WILL GIVE BRAINLIST AND THANKS The half-life of an element is 150 years. If a 40-gram sample was originally deposited, how much is left
after 300 years?

Question 4 options:

30 grams

20 grams

10 grams

5 grams

20 grams

Explanation:

40g= 300

x = 150

cross multiply, 40*150/300

6000/300= 20g

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.