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Sensational Cell Phones offers a plan of $30 for the first 300 minutes, and an additional $0.30 for every minute over 300. Let t represent the total talk time in minutes.
Write a piecewise-defined function that represents the cost of S(t) in terms of the number of minutes t that is used.

Sensational Cell Phones offers a plan of 30 for the first 300 minutes and an additional 030 for every minute over 300 Let t represent the total talk time in min class=

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helpfulmann

Answer:

Since g(f(x))=x g ( f ( x ) ) = x , f−1(x)=x2−1 f - 1 ( x ) = x 2 - 1 is the inverse of f(x)=2x+2 f ( x ) = 2 x + 2 .

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