5t minus t = 4t and 10 minus 4 = 6 so 4t+6
Minerals are mined from the ground in two of the most common processes: surface mining (minerals at or near the surface) and subsurface mining (minerals deep underground in the Earth). Minerals are processed through mineral processing which separates the valuable items from the rest of the mineral.
Of the 126 planes on the ground, 42 were totally destroyed, 41 were damaged, and only 43 were left fit for service. Only 6 U.S. planes got into the air to repel the attackers of this first assault. In total, more than 180 aircraft were destroyed
