Guys please, please help

1. What is the domain? range?

2. Does the relation represent a liner equation? Why?

Need this asap if anyone can i would be very grateful. if you could show workings that would really

Asailor is looking at a kite. if he is looking at the kite at an angle of elevation of 36and the distance from the boat to the point where the kite is directly overhead is 40 feet, how high is the kite?

You are at a restaurant and owe $38 for your meal. you want to leave a 20% tip. how much will your tip be?