<p>Determine the impedance of a series LCR-circuit if the reactance of C and L are 250<math xmlns="http://www.w3.org/1998/Math/MathML"><mi>&#937;</mi></math>&nbsp;and 220<math xmlns="http://www.w3.org/1998/Math/MathML"><mi>&#937;</mi></math>&nbsp;respectively and R is 40<math xmlns="http://www.w3.org/1998/Math/MathML"><mi>&#937;</mi></math></p>