The selling price is $750. The rate of the sales tax is 5%. How much is the sales tax?
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Remember that to find the vertical asymptotes of rational functions, we just need to set the denominator equal to zero and solve for the variable, in this case 
, so lets do it:
As you can see, our rational functions has 2 vertical asymptotes:
and 
As you can see, our rational functions has 2 vertical asymptotes: