In 1990, the rate of change of the world population was approximately 0.09125 billion per year (or approximately 1 million people every four days). the world population was estimated to be 5.3 billion in 1990. write an equation to model the population, p (in billions), in terms of t, where t is the number of years since 1990 (t = 0 corresponds to 1990) a. p = 5.3 0.09125 t b. p = 5.3 t 0.09125 c. p = negative 5.3 0.09125 t d. p = negative 5.3 t 0.09125
