According to the American Freshman, the number of hours that college freshman spend studying each week is normally distributed with a mean of 7 hours and a standard deviation of 5.3 hours. Use the 68-95-99.7% Rule to find the percentage of college freshman who study between 7 and 17.6 hours each week

The stairs leading from the ground to the entrance of a plane forms a right triangle with the ground. if the distance of the stairs measures 22 feet and the ground distance measures 11 feet, how high is the entrance to the plane from the ground? which diagram represents this scenario? / 22ft © 22ft 11 ft 11 ft 22 it