Question

The submarine is at a depth of -116 2/7 feet when the scientists detect a signal frequency from the ocean floor. They dive farther down to a depth of -180 4/7 feet to check the signal. The net change in their elevation is_____feet.

Answer 1

-64 2/7

Explanation:

Answer 2

Answer:
`-64(2)/(7)\text{ feet}`

Explanation:

When the scientists detect a signal frequency from the ocean floor, then the depth of submarine =
`-116(2)/(7)` feet

=
`-(814)/(7)` feet

When they dive farther to check the signal, then the depth of the submarine=
`-180(4)/(7)=-(1264)/(7)` feet.

The net change in their elevation =
`-(1264)/(7)-(-(814)/(7))`

`=-(1264)/(7)+(814)/(7)\\=-(450)/(7)=-64(2)/(7)\text{ feet}`