The function f(x)=5000(0.98)0.3xf(x)=5000(0.98)0.3x represents the number of white blood cells, per cubic millimeter, in a patient x days after beginning treatment for a virus. What is the average decrease per day in white blood cells per cubic millimeter between days 1 and 5?
−29.75 mm3/day
−34.75 mm3/day
−282.47 mm3/day
−353.08 mm3/day