Question

A pilot in the military was practicing flight drills. Within a few minutes, his plane was at an altitude of 10,500 ft. He received a command and had to lower his altitude by 520.7 ft. At 374.35 ft above that altitude. He saw a small bird and waved to it. At what altitude did he see the bird.

Answer 1

The target altitude was 10,500 -520.7 ft = 9979.3 ft.

374.35 ft above that is

... 9979.3 +374.35 = 10353.65

He saw the bird at an altitude of 10,353.65 ft.