A. How far does the second bus travel to the apartment?
B. Find the distance x from the bus to the building with the depression of 40°?
C. From the second balcony, she looks down and observes the bus traveling to the apartment. From the angle of depression, it is 70°. How high up is the second balcony?
D. From the angle of elevation of 35°, there is a balloon above the second balcony. How high up from the ground is the balloon?