How do you find the missing angle of a right triangle?

When it comes to finding a missing angle of a right triangle all you have to do is subtract the sum of the other two angles that you already know. For example, when you have a right triangle and the measures of two angles are 90 and 65 all you have to do is this...
90+65= 155
and...
180-155= 25 which is the sum of the missing angle. 

Hope I helped!

In all honesty, there really is no “work” per say to show. mainly it’s just using the process of elimination. the question is asking which domain(s) would be the most appropriate for the function c(n). n is the number of observed vehicles so right away, 1, 2, and 3 can be eliminated.why? 1, 2 start in the negatives and therefore it is impossible to observe negative cars. so, #4 would be the best answer to the given problem.