The enrollment at a high school for the year 2007 is approximately 1500. the growth of the school population can be represented by the equation p = 1500(1.04)x where x represents the years after 2007. after how many years will the population of the school be approximately 1900?

Two farmers pay a total rent of $140 for a pasture. the first farmer placed $4 oxen in the pasture, and the second farmer placed $30 sheep in the pasture. the farmers split the rent based on the proportion of the pasture eaten by their own animals that month. how much should the first farmer pay, if 1 ox eats as much as 10 sheep in a month?