Step-by-step explanation:
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Step-by-step explanation:
survey a specific amount of students and ask then if they spend les that 2 hours a night of studying or 2 or more hours a night studying.
I don't know but I know it is going to be a lot
Answer:

Step-by-step explanation:
The half life is the amount of time it takes a substance to decay to half of its original amount.
Since the radioactive substance has a half life of 1000 years, there will be half of it left after 1000 years.
So, the fraction that will be left after 1000 years is 