Organisms a and b start out with the same population size. organism a's population doubles every day. after 5 days, the population stops growing and a virus cuts it in half every day for 3 days. organism b's population grows at the same rate but is not infected with the virus. after 8 days, how much larger is organism b's population than organism a's population? answer the questions to find out. 1. by what factor does organism a's population grow in the first five days? express your answer as an exponential expression.