Alex usually runs for 21 hours a week training for a marathon. if he is unable to run for 3 days describe how to find out how many hours of training time he looses and write the appropriate integer to describe how it affects his time.

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