An experimental drug was injected into the bloodstream of a rat. The concentration C(t) of the drug (in micrograms per milliliter of blood) after t hours was modeled by the function: C(t) = 0.3e-0.47 ,where 0.5 (less than or equal to) t (less than or equal to) 10When will the concentration of the drug be 0.029 micrograms per milliliter?

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