Write the Word or Phrase That Best Completes Each Statement $$\frac { 30 t } { t ^ { 2 } + 49 }$$

Essay

Write the word or phrase that best completes each statement or answers the question.
-The concentration C of a certain drug in a patient's bloodstream is given by $$\frac { 30 t } { t ^ { 2 } + 49 }$$ a) Find the horizontal asymptote of C(t).
b) Using a graphing utility, determine the time at which the concentration is highest.