the rim of a canyon is at an altitude of 45m. On a hike down into the canyon, a party of hikers stop for a rest 160m below the rim. They descend another 71m. What is their new altitude?

45 - 231 = -186

To find the new altitude of the hikers after descending another 71m, you need to subtract 71m from their previous altitude.

Given that the party of hikers were initially at an altitude of 45m and then descended to a point 160m below the rim, their new altitude becomes:

Altitude after descending 160m = Initial altitude - Descend distance
= 45m - 160m
= -115m

Please note that the negative sign indicates that the hikers are below the reference point, in this case, the rim of the canyon.

Now, to find the new altitude after descending another 71m, we need to subtract the additional distance from the current altitude:

New altitude = Altitude after descending 160m - Descend distance
= -115m - 71m
= -186m

So, the new altitude of the hikers after descending another 71m is -186m.