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A company's total sales (in millions of $) t months from now is given by the...

A company's total sales (in millions of $) t months from now is given by the function S(t)=2√t+6      (√=square root symbol with t+6 in it)

  1. Find the average rate of change in sales in two to four months from now.
  2. Find the  with appropriate units. Use the limit definition of the derivative (with rationalizing)
  3. Find the sales and the instantaneous rate of change of sales in six months. Write a brief explanation of these results
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