A tree is 5m tall and 10 meters away from a camera of focal length 3mm the tree is aligned with z-axis of the camera and the image of the tree is 100 pixels vertically calculate the vertical pixel width in Milli- meters (mm). Give your answer to 3 decimals .

Find the angle between(-2,-3 ) and(-4,-6 ).

A person stands on the top of a 165165 foot tall cliff looking at a boat out on the water. The angle of depression from the cliff to the boat is 33 degrees. Find the distance from the boat to the base of the cliff. Round your answer to 3 decimal places.

Woman was in kitchen, motion light mounted on wall shined down on her and cast a shadow that was the exact length as the width of the counter, which measured 5 feet. You know the angle of elevation to the light is between pi/4 and 4pi/15. What is the height of the female?