Final answer:
The distance from the field mouse to the bird's eyes is approximately 64.3 meters.
Step-by-step explanation:
To find the distance from the field mouse to the bird's eyes, we can use trigonometry. Given that the angle of depression is 65 degrees and the mouse is 30 meters from the base of the tree, we can use the tangent function to calculate the distance. The tangent of the angle of depression is equal to the opposite side (the height of the tree) divided by the adjacent side (the distance from the tree to the mouse). So, tan(65) = opposite/30. Solving for the opposite side gives us: opposite = 30 * tan(65). Using a calculator, we find that the distance from the field mouse to the bird's eyes is approximately 64.3 meters.