Asubmarine descended 1200 meters below the surface of the water. it then rose 800 meters and then descended 250 meters.

what was the submarine's net gain or loss in altitude? {note: m stands for meters}

a. -1200 m

b. -650 m

c. -400 m

d. 650 m

Aprofessional hockey team has noticed that, over the past several seasons, as the number of wins increases, the total number of hot dogs sold at the concession stands increases. the hockey team concludes that winning makes people crave hot dogs. what is wrong with the hockey team's conclusion? a) it does not take into account the attendance during each season. b) it does not take into account the number of hamburgers sold during each season. c) it does not take into account the number of concession stands in the hockey arena. d) it does not take into account the number of seasons the hockey team has been in existence.