We use the notation |-2| to say “the absolute value of -2,” which means “the distance of -2 from 0 on the number line” What does |-7| mean and what is its value? What does |1.8| mean and what is its value?

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.