Answer
$g(-2)=12.5$
Work Step by Step
We plug in the given value for the independent variable. Then, we follow the order of operations. According to the order of operations, we simplify inside parentheses, then we simplify powers, then we multiply and divide, and finally, we add and subtract. When we do this, we find:
$g(-2) = 2\cdot 0.4^{-2} = 2 \cdot \frac{1}{0.4^2} = 2 \cdot \frac{1}{0.16} = 12.5$
