Item 10 a cheetah that is running 90 feet per second is 120 feet behind an antelope that is running 60 feet per second. how long will it take the cheetah to catch up to the antelope?

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