The sales-tax rate was 7%. The two CDs cost $15.49 each. What was the total cost of the two CDs including tax?

Divide. reduce the answer to lowest terms.5 2/3 ÷ 3 1/9

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?

Aparticular telephone number is used to receive both voice calls and fax messages. suppose that 25% of the incoming calls involve fax messages, and consider a sample of 25 incoming calls. (a) what is the expected number of calls among the 25 that involve a fax message?