Answer:
b. 8.94%
Step-by-step explanation:
Cost Salvage Depreciable cost Life Depreciation
Machine X 593,000 40,000 553,000 14 39,500
Machine Y 816,000 82,000 734,000 10 73,400
Machine Z 301,000 61,000 240,000 6 40,000
1,710,000 1,527,000 152,900
Composite Rate = Total Depreciation/Total Cost
Composite Rate = 152,900 / 1,710,000
Composite Rate = 0.089415205
Composite Rate = 8.94%