The number of bacteria in a culture can be modeled by the function N(t) = 28ť - 30t + 160, where t is the temperature, in degrees Celsius, the
culture is being kept. A scientist wants to have fewer than 200 bacteria in a
culture in order to test a medicine effectively. What is the approximate domain of
temperatures that will keep the number of bacteria under 200?
А
"1.01°C B
-0.90°C < t < 1.97°C
*0.86°C < t < 1.93°C
D
"0.77°C < t < 1.85°C