Multiple Choice
If you can download 10 ring tones for your cell phone for $10 or you can download 11 ring tones for your cell phone for $10.50, then the marginal cost of the eleventh ring tone is
A) $0.50.
B) $10.00.
C) $10.50.
D) $20.50.
Correct Answer:

Verified
Correct Answer:
Verified
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