The school office has organized a telephone tree system to use in case of emergency. The first caller phones three parents these parents I turn each call three more parents and so on how many parents will receive a phone call by the third round

Step-by-step explanation: A telephone tree is a simple, widely used system for notifying staff of a crisis

event when they are not at school. A very carefully crafted statement, specifying

what is and is not yet known, should be drafted before the telephone tree is

activated.

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step-by-step explanation:

at least i think its