i need the formula of this questions

colume A / 18 in excel

paid a dividend. 17 11. All's English professor grades based on a weighted average of quizzes (30%), essays (40%), participation (10%) and final exam (20%). His quiz average was 90%, essay average was 80%, 18 participation (100%, and final exam 95%. What was his weighted average grade? 19 12. Tyrique earn sold 100 pairs of Addidas Yeezy's for $30,000, having bought them all four weeks ago 20 for $25,000. What was his annualized return? 21