(1 point) A bacteria culture starts with 4000 bacteria and the population triples after 2 hours. Find an expression for the number y(t) of bacteria after 1' hours. y(t) = as! (1 point) The half-life of phosphoms-32 is 14.29 days. If a sample has a mass of 300 mg, find the mass (in mg) that remains after 26 days. ::: mg remains. \f