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

Question

3 years ago

6

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.

Mathematics

1 answer:

Annette [7] · Answer 1 · 2022-07-17T13:26:53+03:00

Annette [7]3 years ago

5 0

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 .