If a cup of coffee has temperature 89 C in a room where the ambient air temperature is 20 C, then, according to Newton's Law of Cooling, the temperature of the coffee after t minutes is T(t) = 20 + 69e-/. What is the average temperature of the coffee during the first 22 minutes? average temp = Submit Question14 A company's marginal cost function is C"(a:) = where x is the number of units. Find the total cost of the rst 54 units (from x=0 to X=64) Submit Question Find the accumulated present value of an investment over a 6 year period if there is a continuous money ow of $12,000 per year and the interest rate is 1.7% compounded continuously. _