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| rev | Admin | (Created page with "'''Solution: D''' <math display = "block"> D=\frac{2(40,000) v^{2}+3(25,000) v^{3}+4(100,000) v^{4}}{40,000 v^{2}+25,000 v^{3}+100,000 v^{4}}=3.314. </math> {{soacopyright | 2023 }}") | Nov 20'23 at 12:13 | +185 |