double-declining balance and partial year depreciation?
On April 1, 2008, Bricen Backhoe Co. purchases a trencher for $253,000. The machine is expected to last five years and have a salvage value of $25,300.
Compute depreciation expense for year 2009 assuming the company uses the double-declining balance method.

are you sure what you’re asking? Partial year? the question says 2009 which would be a full year.
For 2009 a full year depreciation expense would be $70,840.
For the partial year of 2008 the depreciation expense would be $75,900.