Question

A submarine at the surface dives 375 ft and then another 175 ft. express the final depth as an integer.

a. –525 ft
b. –550 ft
c. 550 ft
d. 525 ft

Answer 1

Answer: Hello mate!

If we consider y = 0ft in the surface (the initial position of the submarine)

When the submarine does the first dive, it descends 375ft

then the position is y = 0ft - 375ft = -375ft

where the position is negative because the submarine is descending.

Now, the submarine decends another 175ft, so the new position is:

y = -375ft - 175ft = -550ft