hillnesha
contestada

A cross country skier made the following changes in altitude during a 5 hour period :up 28 meters,down 124 meters , down 40 meters,up 75 meters ,down 225 meters. What was the skiers net change in altitude?

Respuesta :

sqdancefan

Given

changes in altitude of +28 m, -124 m, -40 m, +75 m, -225 m

Find

the net change in altitude

Solution

The net change will be the total of the given changes:

... (28 -124 -40 +75 -225) m

... = (103 - 389) m

... = -286 m

The net change in altitude was down 286 meters.

_____

A calculator will easily add signed numbers for you.