Information for Everett Evacuators for 2015 and 2014 is presented below. Everett uses the straight-line depreciation method.

	2015	2014
Non-current assets	$250 000	$190 000
Accumulated depreciation	100 000	85 000
Depreciation expense	62 500	47 500
Total revenues	1 000 000	900 000
Total assets	625 000	475 000

Using the data for 2015, determine the average useful life of Everett's non-current assets rounded to one decimal place.

		1.6 years
		4.0 years
		2.5 years
		4.7 years