3. Micah's kite string is 72 feet long. The angle of elevation from
his position on the ground to the
kite in the air is 65º. About how
high is the kite?

Scores on a university exam are normally distributed with a mean of 78 and a standard deviation of 8. the professor teaching the class declares that a score of 70 or higher is required for a grade of at least “c.” using the 68-95-99.7 rule, what percentage of students failed to earn a grade of at least “c”?