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**Finding initial velocity and time!!! Please please help!!!**

**1. A missile is aimed to hit a target 650 km away. If the missile is fired at an angle of 20 degrees with the horizontal, what should be its launch speed so that it will hit the target? Once fired, how long does the missile take to hit the target?**

## Homework Equations

I'm not certain which equation to use to get the initial velocity. But I think I may have to use the 3rd equation of motion: velocity final = velocity initial + 2 (acceleration)(displacement)....however, i'm missing alot of the variables. So i don't know where to even get started! And then for the second part, we need to find time! So I think maybe using the 1st equation of motion or the 2nd equation of motion? velocity final = velocity initial + (acceleration) (time)?

## The Attempt at a Solution

As I said, I'm not even certain where to begin! I am given the information that the direction is 20 degrees and that the displacement of the hypotenuse is 650 km or 650 x 10^3. Then I found the opposite is 222 km and the adjacent is 611 km by using the law of sin and cos. I really think I'm way of track, and I need some assistance getting back on track please!