![\"\"](\"http://www.mathskey.com/userfiles/image/steps_images/step1.JPG\")
Rate of change ![\"\"](\"http://www.mathskey.com/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=1351f25bdd639885b2d3cc9b5074b6de.png\")
.
From the table substitute the values in the above formula.
\Rate of change ![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=8f5f7fc98069ee4c82a84d5df48ce690.png\")
![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=c81e1e20da7199b17ba17297bbb9e82c.png\")
.
The rate of change is zero. Therefore admission fee is constant per every hour.![\"\"](\"http://www.mathskey.com/userfiles/image/steps_images/solution.JPG\")
The rate of change is zero. Therefore admission fee is constant per every hour.