Question

A small submarine started its dive at sea level and descended 30 feet per minute. Which integer represents the submarine's depth after seven minutes?

Answer 1

its -210 because if you multiply 7 and 30 you get 210 and it says descended, which means to drop, so your decreasing so it would be -210

Answer 2

So since the rate at which the small submarine is diving is 30 feet per minute, after 7 minutes the submarine would have been at a depth of 210 feet.