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