Give the step-by-step reasoning process and then the final answer. 3000 bees hatch from the queen's eggs every day. If a queen loses 900 bees every day, how many total bees are in the hive (including the queen) at the end of 7 days if at the beginning the queen had 12500 bees?
3000 new bees are born every day. In 7 days there will be 3000 * 7 = 21000 new bees. If each day the queen loses 900 bees, in 7 days there will be 900 * 7 = 6300 fewer bees. If at the beginning the queen had 12500 bees, then at the end of 7 days she will have 12500 + 21000 - 6300 = 27200 bees. The total number of bees in the hive including the queen is 27200 + 1 = 27201.
The final answer: 27201.