Question 6 of 8 (1 point) | Attempt 1 of Unlimited View question in a popup 31 Secon Exec 47 The population P(r) of a culture of the bacterium Pseudomonas aeruginosa is given by P()=-1697+76,000+ 10,000, where t is the time in hours since the culture was started. Part: 0/2 Part 1 of 2 (a) Determine the time at which the population is at a maximum. Round to the nearest hour. The population is at a maximum approximately hours after the culture was started.