What is the circumference of a circle with a radius of 86 inches? use 3.14 for PI

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

Whit h equation best represents this situation the number 98 increased by an unknown number equal to 120

Given sin28.4=.4756, cos28.4=.8796, and tan28.4=.5407 find the cot of 61.6