A submarine dives 390 feet every 3 minutes and 5,200 feet every 40 minutes.

1 answer:

3 0

(3,390)(40,5200)
slope = (5200 - 390) / (40 - 3) = 4810/37 = 130

so the sub dives 130 ft per minute

there are 60 minutes in an hr
130 * 60 = 7800 ft per hr

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