The spread of a disease through a community can be modeled with the logistic equation dy/dt = 0.9/1+45eˉ⁰·¹⁵ᵗ , where y is the proportion of people infected after t days . according to the model, what percentage of the people in the community will not become infected? (a) 2% (b) 10% (c) 15% (d) 45% (e) 90%