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A submarine descends into the ocean at a constant rate of 120 feet per minute. Which equation best describes the depth of the submarine, y, after x minutes?

A submarine descends into the ocean at a constant rate of 120 feet per minute. Which equation best describes the depth of the submarine, y, after x minutes?
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4 votes
A submarine descends into the ocean at a

constant rate of 120 feet per minute. Which
equation best describes the depth of the
submarine, y, after x minutes?

A submarine descends into the ocean at a constant rate of 120 feet per minute. Which-example-1
User Brian Schroeter
by
8.4k points

1 Answer

3 votes
18 mins.
Step-by-step explanation:
Time taken to travel 20 m = 1 min
Time taken to travel 360m = x min
therefore:
1/20=x/360

(cross multiply)
20 x =360(isolate x by dividing both sides by 20)
x = 360
20 x
= 18 mins.
User SimonVT
by
8.0k points
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