After a special medicine is introduced into a petri dish full of bacteria, the number of bacteria remaining in the dish decreases rapidly. The relationship between the elapsed time t, in seconds, and the number of bacteria, B second ( t ), in the petri dish is modeled by the following function: Bsecond(t)=6000⋅(15/16)t Complete the following sentence about the rate of change in the number of bacteria in minutes. Round your answer to two decimal places.
Every minute, the number of bacteria decays by a factor of ___.