Question 408041
h(t)=-9.81t^2-10t+350
.
set h(t) to zero and solve for t:
h(t)=-9.81t^2-10t+350
0=-9.81t^2-10t+350
applying the "quadratic formula" we get:
t = {-6.51, 5.49}
throw out the negative solution leaves you with
t = 5.49 seconds
.
Details of quadratic follows:
*[invoke quadratic "x", -9.8, -10, 350 ]