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15. DETAILS Rate of Change. The number of patients admitted at a local hospital between January (t = 0) and December (t = 11) of 2011 is given by the function N(t) - (3.8 t + 1.1)(0.3 t - 0.37)2 How fast was the number of patients changing in September 2011? Note: Enter your solution as a decimal rounded to four (4) decimal places without units. Submit