To make a living, many fur trappers became guides for lands west of thr rockies because a. animal activist groups were outraged by the practices of fur trappers. b. there were fewer animals west of the rockies. c. being a guide was more exciting. d. fur trading had become less profitable

The answer will be d

We are given with an angle of depression of the bird to the field mouse of 50 degrees while the distance from the base tree to the mouse of 40 meters. To get the height of the bird from the ground, we take the tan of 50. We express tan 50 = height / base distance. tan 50 = height/ 40 meters. Hence the height is 47.7 meters.