A1:A-SSE.B.3.c: Use the properties of exponents to transform expressions for exponential functions emphasizing integer exponents. For example, the growth of bacteria can be modeled by either f(t) = 3^(t+2) or g(t) = 9(3^t) because the expression 3^(t+2) can be rewritten as (3^t)(3^2) = 9(3^t).