The amounts of food waste generated in a region during two years were 37,500,000 tons and 30,400,000 tons. What was the total food waste generated over these two years in the region, expressed in scientific notation? 67.9 ⋅ 1014 tons 6.79 ⋅ 107 tons 67.9 ⋅ 107 tons 6.79 ⋅ 1014 tons