The formula to calculate the mass, M(t), remaining from an original sample of radioactive material with mass Mo, is determined using the formula
M(t) = M.
where t is time and h is the half life of the substance. The half-life of a radioactive substance
is 8 hours. How many hours will it take for a 300 g sample to decay to 75 g?

Why do interests rates on loans to be lower in a weak economy than in a strong one

33% of college students say they use credit cards because of the rewards program. you randomly select 10 college students and ask each to name the reason he or she uses credit cards. find the probability that the number of college students who say they use credit cards because of the rewards program is (a) exactly two, (b) more than two, and (c) between two and five inclusive. if convenient, use technology to find the probabilities.

Bill works as a waiter and is keeping track of the tips he ears daily. about how much does bill have to earn in tips on sunday if he wants to average $22 a day? tips by day tips (dollars) monday tuesday wednesday thursday friday saturday $14 $22 $28 $36