All students in Ridgewood Junior High School either get their lunch in the school cafeteria or brought it from home on Tuesday. 4% of students brought their lunch. 48
students brought their lunch. How many students in total are in Ridgewood Junior
High School

please help me!!

Amountain climber starts a climb at an elevation of 453 feet above sea level at his first rest stop he has climbed 162 feet and by his second rest stop he has climbed another 207 feet its getting late in the day so the climber starts his way down if the climber desends 285 feet how much does he need to ascend or descend to return to the original starting point