a cell population starts at 250 and is increasing at an exponential rate of 2.25 each hour. what will the population be after 1 hour? 4 hours? 11 hours? use this formula to solve : y=a b ^t and round to the nearest whole number.

In a certain pentagon, the interior angles are a,b,c,d,e where a,b,c,d,e are integers strictly less than 180. ("strictly less than 180" means they are "less than and not equal to" 180.) if the median of the interior angles is 61 and there is only one mode, then what are the degree measures of all five angles?

7. the area of the playing surface at the olympic stadium in beijing isof a hectare. what area will it occupy on a plan drawn to a scaleof 1: 500?

Which type of graph would allow us to quickly see how many students between 100 and 200 students were treated?