Farmers living in the countryside marked 50 goats and released them. The next day they counted 150 goats, 15 of which had marks
What is the best estimate for the goat population in the countryside?
PLEASE QUCIK

One expression below in undefined, and the other expression has a well defined value. which expression is undefined and explain why it has no value. which expression is defined? what is the value of that expression and how do you know? what is a different expression using a trig inverse function that is also undefined?

Answer question above and explain each step : )

2. explain in words how you plot the point (4, −2) in a rectangular coordinate system.