The figure shows the depths of a submarine. Find the vertical difference traveled by the submarine

Find the mean hourly vertical distance traveled by the submarine

Answers:

Vertical distance traveled = 410.7 feet

Mean hourly vertical distance = 136.9 feet per hour

Explanation:

We'll subtract the positive versions of the two numbers (large - small) to get

725.6 - 314.9 = 410.7

This tells us that the distance between those depth markers is 410.7 feet

In other words, the submarine has risen 410.7 feet in vertical distance over those 3 hours.

The mean hourly distance, aka the speed, is

speed = distance/time

speed = (410.7 feet)/(3 hours)

speed = (410.7/3) feet per hour

speed = 136.9 feet per hour

This is another way of saying "each hour, the submarine goes up by exactly 136.9 feet".

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