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It seems really sad. What is the minimum number of students?
Well, I know that there are only a few people studying physics/chemistry in our university, but they still keep those departments and they try to improve it by adding some features to the course (such as Physics with Computer Engineering). Traditionally, math students were around 10-15, but we started to increase in number especially since the math department opened new programs (such as Applied Math Major in Finance and Applied Math Major in Computational Science). Heck, our batch only have one student whose Major is Filipino, but they still teach him. I guess it is just a matter of the university's dedication to teach students. (But there is a minimum number of students that is required for a class. If that is not met, the students will join another class with the same subject or some kind of compromise will be done.)

Well, I thought that basic physics (such as free fall, projectile motion) is taught in most high schools. There are what I consider as two versions of basic physics- calculus and non-calculus version. Personally, I liked the one without calculus back in high school because I had an easier time deriving formulas from definitions unlike in our analytical physics (calculus version) wherein we get confused until we see a familiar formula (maybe it was just my prof's lack of teaching skills). The only difference is that the calculus version includes more concepts like derivatives, integrals and limits. But the calculus version is still manageable if you have the basic background in physics and calculus. Anyway, if you just understand the formulas (how it was derived or its definition), things will be a little simple because all that is left is manipulating those formulas according to what is given.

For problems like those, you could search for Kinematics or Vectors since the problem can be reduced to considering the x and y components, where y is affected by gravity or free fall. Just to give the basics (Presuming that you know the kinematic formulas because it is a matter of plugging in the values):
Calculate the time it takes for the object to fall into the ground (using the y component wherein (speed)*(sin (_degree)) is the vertical speed). Velocity at the maximum height is zero and acceleration due to gravity is 9.8 meters per second. Formula: final velocity= initial velocity + acceleration*time. Remember that the thing goes up, then down so multiply it by two to get the time it takes to go up and down. (Presuming it is on a level ground, which makes the time going up equal to time going down).
Then calculate the horizontal distance it travelled (by using cos (_ degree) to get the horizontal speed). Formula: distance= time*(velocity intitial + velocity final)/2
To put it simply, compute for the time using the free fall principle (gravity with an acceleration of 9.8 meters per seconds) and then use that time to get the horizontal distance. (Also be sure that you use the same units such as meters per second into miles per hour).