A plane is at an altitude of 21,012 2/3 feet above ground level. After 30 minutes, the plane rises by an altitude of 6,273 3/8 feet. Which of the following is true about the altitude of the plane after 30 minutes?
A.
The altitude of the plane after 30 minutes is -27,286 1/24 feet.
B.
The altitude of the plane after 30 minutes is 14,740 1/24 feet.
C.
The altitude of the plane after 30 minutes is -14,740 feet.
D.
The altitude of the plane after 30 minutes is 27,286 1/24 feet.
D. The altitude of the plane after 30 minutes is 27,286 1/24 feet.
To find the altitude of the plane after 30 minutes, we add the initial altitude (21,012 2/3 feet) and the rise in altitude (6,273 3/8 feet):
21,012 2/3 + 6,273 3/8 = 21,012 16/24 + 6,273 9/24 = 27,285 25/24 = 27,286 1/24 feet
Therefore, the correct statement is that the altitude of the plane after 30 minutes is 27,286 1/24 feet.