Use the property of exponents to rewrite the expression
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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?

Shannon drove for 540 minutes. if she traveled 65 miles per hour,how many total miles did she travel?

Ana earns 2.5% simple interest on $2,000 in her savings account. she does not make any deposits or withdrawals. after 3 years, how much interest will ana have earned on her savings account?