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Mathematics 11 Online
promisemiller:

If a submarine dives 255 feet in 15 seconds, the average change in elevation is _____ feet per second.

jhonyy9:

use the rule of 3 simple and write 255 feet in 15 sec. x feet in 1 sec cross multiplie and calcule the value of x x = 255/15 = ? feet hope helped understandably

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