Answer
$|-6+8i|=\sqrt {(-6)^2+8^2}=\sqrt {100}=10$
Work Step by Step
$z=-6+8i$
$|a+bi|=\sqrt {a^2+b^2}$
$|-6+8i|=\sqrt {(-6)^2+8^2}=\sqrt {36+64}=\sqrt {100}=10$
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