1. A plane takes off at 15 degree angle and flies at an average speed of 660km/h. How high will it be two minutes after it’s wheel have left the earth? Round your answer to the nearest tenth of a kilometer.
2. The angle of depression of a boat on a lake is 21 degree from a lookout on a cliff that is 150m above the water level of the lake. What is the distance of the boat from the base of the cliff?
3. A helicopter is flying at an altitude of 3000m. The helicopter is flying in a straight line away from David. If he sees the angle of elevation of the helicopter change from 75 degree to 40 degree in one minute, what is the speed of the helicopter of nearest kilometer per hour.
4. In triangle XYZ, where angle Y is 90 degree and the length of z is twice as long as the length of x. Find the measure of angle x to the nearest degree.
Thank you so much, I really appreciate it. It would really help if you could provide a diagram