If each exterior angle of a regular n-gon is 9 how many sides must the polygon have

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?

Write an inequality for this description. - one fourth of the opposite of the difference of five and a number is less than twenty.

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