The plant engineer discovers that the perennial grass they have available has the following energy characteristics: Perennial grass: 18.1 MJ/kg Coal: 28 MJ/kg The engineer decides that the energy content of the mixture should be 24.5 MJ/kg. How many metric tons of perennial grass should mixed in with each metric ton of coal burned in order to achieve the target energy content? 1 metric ton = 1 MT = 1000 kg Answer tolerance: /- 0.1 tons