If z is equal to 13 minus 7 i , what is the value of absolute value of z ?

For a complex number z = a + bi, its absolute value is √(a² + b²). Here the real part is 13 and the imaginary part is −7, so |z| = √(13² + (−7)²) = √(169 + 49) = √218. The correct choice is square root of 218.

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