A population of bacteria is treated with an antibiotic. It is estimated that 5,000 live bacteria existed in the sample before treatment. After each day of treatment, 40% of the sample remains alive. Which best describes the graph of the function that represents the number of live bacteria after x days of treatment? Of(x)=5000(0.4)*, with a horizontal asymptote of y = 0 O f(x)=5000(0.6), with a vertical asymptote of x = 0 O f(x)=5000(1.4), with a horizontal asymptote of y = 0 O f(x)=5000(1.6), with a vertical asymptote of x=0