Question

Quadratic Functions Word Problem数学,函数,方程

Answer 1

Solution:

Let h be 50m

-4.9t²+38t+1.75=50

4.9t²-38t+48.25=0

t₁= 1.60s

t₂= 6.16s

Time duration Δt = 6.16-1.60 = 4.56 (s)

Ans:The length of time is 4.56 seconds.