Double-Declining-Balance Depreciation A building acquired at the beginning of the year at a cost of $81,600 has an estimated residual value of $4,900 and an estimated useful life of 4 years. Determine the following. (a) The double-declining-balance rate X9 (b) The double-declining-balance depreciation for the first $X year Feedoack - Check My Work The double-declining rate is two times the straight-line rate. When the double-declining balance method is used, the estimated residual value is not considered