The population of the Midwestern city follows exponential law.
(i) if N is population of city and t is time in years, state N as the function of t.
(ii) if population decreased from 900,000 to 800,000 from 2003 to 2005, find population be in 2007?
(iii) The half life of radio active potassium is 1.3 billion years. if 10 grams are present now, how much will be there in 100 years? in 1000 years?