When you have 3 for every 7, you divide
450 divided by 3
150
I would say a but not 100% sure.
Multiply each side by p, so
kp = ar
Divide each side by a, so
kp/a = r
The answer is the third option
EXPLANATION:
600-100+500+300
= 1300 feet
ANSWER: 1300 feet is the submarine’s final depth.
Hope it helps u!