Help MEE PLEASEE :( Im stressing sm

Answer:
smaller t= 0
larger t= 4
Step-by-step explanation:
smaller t is the t sqrd
larger t is the 4t
h(t) = t^2 + 4t + 3
h(0) = (0)^2 + 4(0) +3
0 + 0 + 3
= 3
i think the vertex of the parabola is
negative positive 3 or (-3,3),(3,-3)
I don't think if that's the correct answer.