Answer
-3
Work Step by Step
$g'(t)=\lim\limits_{h \to 0}\frac{g(t+h)-g(t)}{h}=\lim\limits_{h \to 0}\frac{[8-3(t+h)]-[8-3t]}{h}$
$=\lim\limits_{h \to 0}\frac{8-3t-3h-8+3t}{h}=-3$
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