Given that a company lets you download songs for $0.99 each after you pay a $5 fee to be a member, evaluate f(4)
�
(
4
)
for the function of total cost for x songs.
Responses
3.96
3.96
8.96
8.96
9.90
9.90
21. 96
The correct answer is 8.96.
The function f(x) gives the total cost for x songs. For each song, the cost is $0.99. However, to be able to download songs, you need to pay a membership fee of $5. So the total cost for x songs can be given by:
f(x) = 5 + 0.99x
To evaluate f(4), we substitute x = 4:
f(4) = 5 + 0.99(4) = 5 + 3.96 = 8.96
Therefore, the total cost for 4 songs is $8.96.