Asubmarine descended 1200 meters below the surface of the water. it then rose 800 meters and then descended 250 meters.

what was the submarine's net gain or loss in altitude? {note: m stands for meters}

a. -1200 m

b. -650 m

c. -400 m

d. 650 m

answer

d. 10

explanation

the distance from point y to wx is the height of the triangle.

using pythagoras theorem,

group similar terms to get,

this implies that,

take positive square root of both sides to get,

this implies that,

c

-by-step explanation:

it would be c