A piece of equipment was acquired on January 1, 2018, at a cost of $36,000, with an estimated residual value of $4,000 and an estimated useful life of Four years. The company uses the double-declining-balance method. What is its book value at December 31, 2019? Multiple Choice $9,000 $16,000 $18,000 $20,000

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