Question 1173298
the equation is y(t)=-4.9t^2+5t+60
the vertex, or highest point is when t=-b/2a or -5/-9.8 or 0.51 seconds
y(0.51)=61.28 m.
{{{graph(300,300,-2,2,-10,65,-4.9x^2+5x+60,61.3)}}}