Question

Pls help me asap....thanks in advanve

Answer 1

You would at the distances together, since 120 is above sea level and 39 is below. To find the whole vertical distance (the distance they are apart), just add the values (numbers) together. 

$120+39=159$

$159=the-distance$

I hope this helps!
~kaikers

Answer 2

helicopter =  +120 m            submarine = - 39 m 

The vertical distance = +120 m - (-39 m) 

The vertical distance = +120 m  + 39 m 

 The vertical distance = +159 m 

 
I wish you much success in your studies!!!!