Ablow dart is fired horizontally from a height of 1.2 meters. if the dart hits a target that is .6m high and 12m away, what is the initial velocity of the dart?

Blow dart is projected from a height of 1.2 m

Dart will hit the target at height 0.6 m

so the vertical displacement of the dart will be 1.2 - 0.6 = 0.6 m

here we can say that in vertical direction kinematics is applied

now we can say that dart will hit the target after t = 0.35 s

so in the same time it will cover the distance 12 m in horizontal direction

so here in order to find the initial speed we can say

so dart is projected with speed 34.3 m/s in horizontal direction

i cant see the choices man

that tool is called an altimeter which measures your altitude which can be used to tell which atmosphere you are currently in, including the stratosphere.

hope this ! : )