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An antibiotic is applied to a culture of bacteria. The number of bacteria cells remaining in the culture is 7500 given by p\") = , for t .2 II] where t represents elapsed time in seconds. 5t"! +7 Determine the rate of change with respectto time: p'') = E Determine the rate of change at t = 4: :1 cells per second. {Round your answer to 4 decimals as needed.) Choose the best answer: Q The number of bacteria cells is always decreasing and is approaching l], but will never equal 1]. O The number of bacteria cells is always decreasing and is approaching T500. 0 The number of bacteria cells is always decreasing and will eventually equal I]. O The number of bacteria cells is always increasing and is approaching T500