A sample of a radioactive isotope had an initial mass of 330 mg in the year 1990 and decays exponentially over time. A measurement in the year 1995 found that the sample's mass had decayed to 160 mg. What would be the expected mass of the sample in the year 2003, to the nearest whole number?

An automobile assembly line operation has a scheduled mean completion time, μ, of 12 minutes. the standard deviation of completion times is 1.6 minutes. it is claimed that, under new management, the mean completion time has decreased. to test this claim, a random sample of 33 completion times under new management was taken. the sample had a mean of 11.2 minutes. assume that the population is normally distributed. can we support, at the 0.05 level of significance, the claim that the mean completion time has decreased under new management? assume that the standard deviation of completion times has not changed.

What is the 17th term in the arithmetic sequence in which a6 is 101 and a9 is 83

Jayne is studying urban planning and finds that her town is decreasing in population by 3% each year. the population of her town is changing by a constant rate.true or false?