If I have 100 radioactive atoms, and 3 half lives have passed. How many radioactive atoms remain? Explain your reasoning.

Which is not a standard weather variable? a. air pressure b. moon phase c. temperature d. wind speed

Canada plays an important role in the global community in all of the following ways except by a. acting as a superpower with influence over europe and asia. b. promoting arms control and disarmament. c. working with the commonwealth of nations to promote trade. d. promoting trade with japan and other asian countries.

What statement about charlemagne is not true? a. charlemagne's empire collapsed during his rule b. charlemagne sent missionaries throughout europe c. charlemagne encouraged the arts and education d. charlemagne ruled much of western europe a. charlemagne's empire collapsed during his rule