The function C(x)=10/2x²+1} can be used to find the concentration C(x) in mg/L of a certain drug in the bloodstream of a patient x hours after the injection is given. In approximately how many hours after the injection will the concentration of the drug be 1.3 mg/L ?
F. 0.5 h
G. 0.7h
H. 1.8 h
I. 2.3h