Solve Applications with Rational Equations · Exercise 79
Write an inverse variation equation to solve the following problems.
Paul, a dentist, determined that the number of cavities that develops in his patient’s mouth each year varies inversely to the number of minutes spent brushing each night. His patient, Lori, had four cavities when brushing her teeth 30 seconds (0.5 minutes) each night.
ⓐ Write the equation that relates the number of cavities to the time spent brushing. ⓑ How many cavities would Paul expect Lori to have if she had brushed her teeth for 2 minutes each night?
OpenStax, Intermediate Algebra 2e · §7.5 Solve Applications with Rational Equations · Exercise 79
No hints for this one.
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