The circumference of a redwood tree trunk is 20Ο ft, and it is 100 ft tall. what is the approximate volume of the redwood tree trunk? 1,000Ο ft3 10,000Ο ft3 4,000Ο ft3 40,000Ο ft3
In a singing competition, there are 150 participants. at the end of each round, 40% of the participants are eliminated. how many participants are left after n rounds?
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