How many possible juries are there when selecting twelve people from a pool of twenty-one citizens?

Which system of linear inequalities is graphed? can somebody please

You were told that the amount of time lapsed between consecutive trades on the new york stock exchange followed a normal distribution with a mean of 15 seconds. you were also told that the probability that the time lapsed between two consecutive trades to fall between 16 to 17 seconds was 13%. the probability that the time lapsed between two consecutive trades would fall below 13 seconds was 7%. what is the probability that the time lapsed between two consecutive trades will be between 14 and 15 seconds?

The dash figure is a dilation if the original figure. find the scale factor. classify the dilation as an enlargement or a reduction