a submarine dove 836ft.it rose at a rate of 22ft per minute.what was the depth of the submarine after 12 minutes

At first calculate the rising rate
= 22ft/min x 12min
= 264ft
​Then subtract this from 836ft comes ​572ft
So the answer is 572ft
 
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First it's rising rate=22ft per minute
It rose 22×12=264 in 12 minutes
therefore it's height is 836-264=572ft
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572 ft
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