10. The amount of freight transported by rail in the United States was about 580 billion ton-miles in 1960 and has been increasi
ng at a rate of 2.32% per year since then.
a. Write a function representing the amount of freight, billions of ton-miles, transported annually (1960=year 0)
a. Write a function representing the amount of freight, billions of ton-miles, transported annually (1960=year 0)
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