Problema Solution
The cost to purchase a song from iTunes is $0.99 per song. To purchase a song from Napster membership fee is $10. In addition, each purchased song cost $0.89. How many downloaded songs, d, must be purchased for the monthly price of Napster to be the same as iTunes?
Answer provided by our tutors
iTunes - the cost of d songs is: 0.99d
Napster - the cost of d songs is: 10 + 0.89d
10 + 0.89d = 0.99d
by solving we find
d = 100 songs
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For the price to be the same on iTunes and Napster 100 songs must be purchased.