Which point is located at (2, 3)? a b c d mark this and return

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From the top of a tree a bird looks down on a field mouse at an angle of depression of 50°. if the field mouse is 40 meters from the base of the tree, find the vertical distance from the ground to the bird's eyes.

Hi i’m not sure how to do question 20 if u could explain how to do it that’d b great