A submarine was 600 feet below sea level. If it
ascends 250 feet, what is
its new position?

Down below

Step-by-step explanation:=(600-250)m=350m

Step-by-step explanation:

The initial position of the submarine was 600 ft below sea level

Then it ascends, i.e., goes up or moves up 250ft.

So now it is (800–250=)550 ft below sea level. I hope this helps.

option (b) is correct

step-by-step explanation:

to find the solution of this system, we need to convert it into reduced row-echelon form. we have,

after applying row operations r2 -> r2/2 and r3 -> r3/3, we get,