Two economists predict that the price of figs will rise over the course of the next year. The first economist uses the linear model P(t) = 20 + 20t/7 where t is time in months. The second economist predicts that, from its starting price of 20 dollars per pound, the price will increase by 10% each month. After how many months does the second economist predict higher prices than the first economist? Round to the nearest month.