Quadratic equations

Question

An arrow is shot vertically upward from a platform 43 ft high at a rate of 158 ft/sec. When will the arrow hit the ground?

Answer 1

h(t)= -16t^2 +158t +43 = 0

solve for t

factor or use the quadratic formula

t = 158/32 +/-(1/32)sqr(158^2 +64(43)) ignore the negative solution