4. An airplane climbs at a slope of at takeoff. At point A, the plane is 200 feet above the ground. The plane traveled 1,000 feet horizontally, as shown in the diagram below.
B
200 ft.
1000ft.
Not to Scale
What is the altitude of the plane (b) at Point B?
A.200 ft.
B.600 ft.
C.400 ft.
D.2,500 ft.