### Home > PCT > Chapter Ch9 > Lesson 9.3.4 > Problem9-146

9-146.

Convenient range would be [10,20]. Therefore, vertical shift would be 15.

$y = 15-5\text{sin}\left( \frac{\pi}{6} (x-1) \right)$

11.46 feet

x = 1.382
x = 5 AM + 1 hour, 23 minutes = 6:23 AM
Other values = 11:37 AM, 6:23 PM, 11:37 PM

Use the eTool below to see the data at each hour.
Click the link at right for the full version of the eTool: PCT 9-146 HW eTool