Use the distance formula
√(-5-4)²+(8-(-4))² = √81+144 = √225 = 15
The answer is 4, it's a four Dallor difference
18.87 inches the cube root of 6720
An angle of depression involves you at a point and looking downward, with your eyes as the vertex. (An angle of elevation goes up from your line of sight.)
In the picture, imagine your eyes are point A. To make an angle of depression, you look downward. The angle made is angle #1, as none of the other angles use A as a vertex.
Andrew drove at 78 km/h
Brian drove at 83 km/h
234/83 = 2.819 hours, or 169 minutes.
180-169=11