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In which story is the answer to the question $0$ ? $\newline$ Choices: $\newline$ (A)Some marine life researchers are in a submarine that is resting at an elevation of $-115$ feet. They detect movement above and ascend $115$ feet in elevation to capture rare video footage of a western gray whale. At what elevation is the submarine now? $\newline$ (B)Some marine life researchers are in a submarine that is resting at an elevation of $-115$ feet. They detect movement below and descend $115$ feet in elevation to capture rare video footage of a western gray whale. At what elevation is the submarine now?

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Quantities that combine to zero: word problems

Full solution

Q. In which story is the answer to the question

0

?

\newline

Choices:

\newline

(A)Some marine life researchers are in a submarine that is resting at an elevation of

-115

feet. They detect movement above and ascend

115

feet in elevation to capture rare video footage of a western gray whale. At what elevation is the submarine now?

\newline

(B)Some marine life researchers are in a submarine that is resting at an elevation of

-115

feet. They detect movement below and descend

115

feet in elevation to capture rare video footage of a western gray whale. At what elevation is the submarine now?

Calculate elevation change: Solve for the elevation in story (A) after the submarine ascends $115$ feet from $-115$ feet. $\newline$ Calculation: $-115$ feet + $115$ feet = $0$ feet.
Calculate elevation change: Solve for the elevation in story (B) after the submarine descends $115$ feet from $-115$ feet. $\newline$ Calculation: $-115$ feet - $115$ feet = $-230$ feet.

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