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Using a phone card to make a long distance call costs a flat fee of $0.80 plus $0.33 per minute starting with the first minute. Write a function for the cost of a long distance call C(x) in terms of x minutes for this situation.

The average cost of a 1 minute commercial on a leading network channel was 146,000 in the fall of 1999. This was a 8% decrease from the the cost a year earlier. What was the cost of a 1 minute commercial on the channel in the fall of 1998?