Doctors treated a patient at an emergency room from 2:00 P. M. to 7:00 P. M. The patient's blood oxygen level L (in percent) during this time period can be modeled by L = −0.270t2 + 3.55t + 82.1, 2 ≤ t ≤ 7
where t represents the time of day, with
t = 2
corresponding to 2:00 P. M. Use the model to estimate the time (rounded to the nearest hour) when the patient's blood oxygen level was 93%.
P. M.