Question

H= -16t^2+4+18t What is the meaning of 4 in this function

Answer 1

$\bf \textit{initial velocity}\\ h = -16t^2+v_ot+h_o \qquad \text{in feet}\\ \\ \quad \\ v_o=\textit{initial velocity of the object}\\ h_o=\textit{initial height of the object}\\ h=\textit{height of the object at "t" seconds}\\\\ -----------------------------\\\\ H(t)= -16t^2+4+18t\implies \begin{array}{llll} H(t)= -16t^2+18t&+4\\ &\uparrow \\ &h_o \end{array}$