Question

A scientist uses a submarine to study ocean life she begins at sea level which is at an elevation of 0 ft she travels straight down for 70 seconds at a speed of 3.6 ft per second she travels directly up for 50 seconds at a speed of 2.5 ft per second
after this 120 second period how much time, in seconds, will it take for the scientist to travel to sea level at the submarine's max speed of 4.5 ft per second
round answer to nearest tenth of a second

Answer 1

3.6*70 is 252 50*2.5 is 125 252-125 is 127 127/4.5 is 28.2 so 28.2 seconds