The formulas used to analyze the horizontal and vertical motion of projectiles launched at an angle involve the use of which function(s)?

The quickest, easiest, and most direct way to handle that kind of motion involves the use of the sine and cosine.  But if you wanted to show off, you could do it with the secant and cosecant too.

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 ! : )

conservation of mass

mass before something happens = mass afterwards