First of all, know that preserved lemons will keep for quite a while in the fridge. They are preserved, after all. Kept refrigerated, these lemons will keep for about a year, so don't feel that you have to rush to use them up before they go bad.You eat the whole lemon, rind and all â though I'd recommend removing the seeds first.hey are preserved, after all. Kept refrigerated, these lemons will keep for about a year, so don't feel that you have to rush to use them up before they go bad. You eat the whole lemon, rind and all â though I'd recommend removing the seeds first.
Growth Rate in the Present Value of Stock Formula. The growth rate used for calculating the present value of a stock with constant growth can be estimated as. Multiplying the retention ratio by the return on equity can then be reduced to retained earnings divided average stockholder's equity.
1 Rate of growth (lambda) is the ratio of population size at the end of one interval to population size at the end of the previous interval. 2  N(t+1) = N(t) * (lambda); N(t)=N(0) * (lambda) t. 3  r = log e (lambda) and lambda = e rt; when r = 0, lambda = 1 and population density is stable.