A bacteria culture starts with 320 bacteria and grows at a rate proportional to its size. After 2 hours there will be 54'] bacteria. {a} Express the population P after t hours as a function of 3. Be sure to keep at least 4 significant figures on the growth rate. PttH i| _[b] What will be the population after El hours? I I bacteria {c} How long will it take for the population to reach 1690? Give your answer accurate to at least 2 decimal places. | | hours The PH scale for acidity is defined by pl = - log , H where H is the concentration of hydrogen ions measured in moles per liter (M). A solution has a pHI of 7.05. Calculate the concentration of hydrogen ions in moles per liter (M). The concentration of hydrogen ions is moles per liter