A cell phone tower is 62 m tall and has to be supported with cables running from the top of the tower to anchors in the ground on both sides of the tower. The cables must form an angle of 50° with
the ground. Determine how far from the base of the tower the anchors should be placed

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”?