2^24 = 16,777,216 bacterias. Step-by-step explanation: So we start with 1 bacteria after 1 hours: 2*1 = 2 after 2 hours: 2*2 = 2^2 = 4 after 3 hours: 2*2^2 = 2^3 after n hours: 2^n Since one day has 24 hours we have n = 24 and total number of bacteria will be: 2^24 = 16,777,216 bacterias.
It decreased. Assuming that the temperature is 100 and it is now reduced by 60% then the temperature will be at 40 and if it increased by 80% then the final temp is 72. So it is 48% of the original temp.