Simon and his team are preparing to climb my. Sinclair. Base camp is located 21 feet below sea level. Mt. Sinclair is 490 feet above sea level. on the 1st stage of their climb, they will camp at a ranger station located 124 feet above sealevel. The next day they all hike the rest of the way to the peak. What is the difference in elevation in feet from their base camp to the ranger station?

21 + 124 = ?

or, more generally,

124 - (-21) = ?

If a < b, the difference between a and b is b-a.

To find the difference in elevation in feet from the base camp to the ranger station, we need to subtract the elevation of the base camp from the elevation of the ranger station.

The elevation of the base camp is 21 feet below sea level. When we refer to elevations below sea level, we typically consider them as negative values. Therefore, the elevation of the base camp is -21 feet.

The elevation of the ranger station is given as 124 feet above sea level. So the equation to find the difference in elevation would be:

Difference in elevation = Elevation of ranger station - Elevation of base camp

Plugging in the values:

Difference in elevation = 124 feet - (-21 feet)

To subtract two negative numbers, we can treat it like adding their absolute values and then making the result negative:

Difference in elevation = 124 feet + 21 feet

Now we can simply add the numbers:

Difference in elevation = 145 feet

Therefore, the difference in elevation from the base camp to the ranger station is 145 feet.