Magnitude of a Complex Number

Consider the complex number $z = 3 + 4i$. To find the magnitude of this complex number, we will use the formula for the magnitude of a complex number.

The magnitude of a complex number $z = a + bi$ is given by the formula: $$|z| = ext{sqrt}(a^2 + b^2)$$ where $a$ is the real part and $b$ is the imaginary part.

Using the values of $a$ and $b$ from the complex number, calculate the magnitude of $z$ and select the correct answer from the options below.