Question

a submirine is only allowed to change its depth by rising to the surface in 60 meter stages it starts off at -340. at what depth is it after: stage 1. stage 2. stage 3?

Answer 1

-340m

1st step: it goes up 60m, it is at -340+60 = -280m

2nd stage: it goes up 60m, it is at -280+60 =-220m

3rd stage: it goes up 60m, it is at -220+60 =-160m

at the 3rd stage it is -160m deep

or it goes up 60m each time, at the 3rd stage it is at -340+3*60 = -340+180=-160m

Explanation: