Answer:
Using the double-declining balance method, the book value at December 31, 2016 would be $ 46.944
Step-by-step explanation:
Depreciation rate = 1/useful life *100 = (1/10) * 100 
 2015 2016 
Cost 73350 58.680 
Rate 20% 20% 
Dep 14.670 11.736 
Book value 58.680 46.944