Question

The water level at a pier is modeled by the function y= 2.5 cos(2pi/12.5) +12, where y represents the water level measured in meters, and x represents the number of hours since the last high tide. After how many hours is the water first expected to reach a depth of 12 meters? Round to the nearest tenth of an hour.
ANSWER CHOICES
1.6 hours
3.1 hours
14.4 hours
19.6 hours

Answer 1

Answer: 3.1 hours

Step-by-step explanation: Just took the quiz on edg.