Question 1160543
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Those rates of .09 cents per minute and .18 cents per minute are a steal -- 15 minutes for 15(.09) = 1.35 cents (presumably rounded up to 2 cents), or a 100 minute ride for 100(.18) = 18 cents....<br>
I will assume the quoted decimal rates are dollars per minute and not cents per minute.....<br>
Domain: allowable numbers of minutes.<br>
Obviously the minimum number of minutes is 0.<br>
There is theoretically no upper limit of the number of minutes, if you wanted the ride to go forever.  So the domain might be [0, infinity).<br>
Or it is possible that cost is based on whole numbers of minutes; in that case the domain would be the set of non-negative integers.<br>
Range: allowable cost of the ride<br>
Again obviously the minimum cost is 0.<br>
Mathematically, the range is all non-negative numbers.<br>
Realistically, the range is all non-negative integer numbers of cents.<br>
Or again, if the charge is only for whole numbers of minutes, since 18 cents is a multiple of 9 cents, the range might be all non-negative integer multiples of 9 cents.<br>