Algebra problem! Help please!?

Let f(t) be the number of people, in millions, who own cell phones t years after 1990. Explain the meaning of the following statements.

(a) f(10) = 103.8

The number of people who own cell phones in the year ______ is ________

(b) f(a) = 20

There are ___________ people who own cell phones ________ years after 1990

(c) f(5) = b

There will be __________ million people who own cell phones in the year __________ .

(d) f(t) = n

The number _________ is the number of people (in millions) who own cell phones _______ years after 1990.

Comments

  • a) 2000, 103.8 million

    b) 20 million, a years

    c) b million, 1995

    d) n million, t years

  • A in year 2000 Becuase # after f and103.8 people

    B 20 people in roughly 1991

    C in 1995 there's 51.9 people

    D I don't understand sorry

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