Subtract 6.5 from 2.76 which equals -3.14 then you want to multiply -8 to -3.14. X=29.92
<span>Distribution of mineral deposits would be the answer since 'economy' deals with deposits as the rest of the answers deal with weathering and they don't include an economics. </span>
West Siberian Plain, Russian Zapadno-sibirskaya Ravnina, one of the world's largest regions of continuous flatland, central Russia. It occupies an area of nearly 1,200,000 square miles (3,000,000 square km) between the Ural Mountains in the west and the Yenisey River valley in the east.
