Digital ACT Math Practice Question #1316
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Recognize standard Pythagorean triples: $3-4-5$. The modulus is instantly $5$.
The modulus of a complex number $z = a + bi$ is defined as $|z| = \sqrt{a^2 + b^2}$. $$|z| = \sqrt{3^2 + (-4)^2} = \sqrt{9 + 16} = \sqrt{25} = 5.$$...
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