Angelina: A diving bell is lowered to a depth of -124 metres i.e. 124 metres below sea level. If it rises 38 metres and then drops a further 65 metres from this point what is its new depth?
hi Angelina,
-124+38-65 =
-124+38 this is going to get closer to the surface of the water so it will become LESS NEGATIVE. it will be -(124-38) = - 86
-86 - 65 is going to get a lot deeper so it must be like -(86+65) = -151
If you don't understand this I (or someone else) will try to explain it differently.
+118723 
