An arrow shot into the air is 160t - 16^2 feet above the ground t is seconds after it is released. During what period of time is the arrow above 384 feet?

We know that the equation would have to equal 384 in this sense.

160t-16²=384; We want to find t, so we have to have t by itself.

160t-256=384

+256

160t = 640

640:160=4=t

Let's make sure t is 4, so let's plug it in.

160 (4) - 16²=384

640-256=384

384=384

So, at 4 seconds, the arrow was above 384 feet.