Answer
Domain: All real numbers.
Range: $[20,\infty)$
Work Step by Step
Given $$ g(m) = 2.4(m+4)^2+20.$$ The parabola opens upward as we can see from the graph. Its vertex gives the minimum point. The domain and range are given by:
Domain: All real numbers.
Range: $[20,\infty)$
