Un tipo de bacteria se duplica cada hora en el organismo de un animal. Si en el momento que le diagnosticaron la enfermedad el animal tenía 20 bacterias, ¿Cuántas bacterias tendrá después de transcurridas 8 horas

Sorry guys but as you have a small brain

Set $r$ is a set of rectangles such that (1) only the grid points shown here are used as vertices, (2) all sides are vertical or horizontal and (3) no two rectangles in the set are congruent. if $r$ contains the maximum possible number of rectangles given these conditions, what fraction of the rectangles in set $r$ are squares? express your answer as a common fraction.

The length of time it takes to find a parking space at 9 a.m. follows a normal distribution with a mean of 5 minutes and a standard deviation of 2 minutes. find the probability that it takes at least 8 minutes to find a parking space. (round your answer to four decimal places.)