Questions asked by Emma

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• How many oxygen atoms are contained in 223.4 grams of lithium carbonate and how do I get this answer?
  
• How do you write the equation for the basic sine function (y=AsinBx) whose amplitude is 4 and has a period of 10π?
  
• Flying against the wind, a jet travels 3040 miles in 4 hours. Flying with the wind, the same jet travels 8260 miles in 7 hours. What is the rate of the jet in still air, and what is the rate of the wind?