A scientist uses a submarine to study ocean life.

She begins 86 feet below sea level.

After traveling down for 3 seconds, she’s 193 feet below sea level.

Find the rate of change in the submarine’s elevation in feet per second. Round your answer to the nearest tenth.

Answer: 35.7 feet per second.Step-by-step explanation: The scientist starts at -86 feet. Then she goes to -193 feet. The difference here is 193-86 = 107 feet. That means she traveled 107 ft in 3 seconds. 107/3 = 35 with a remainder of 2. 2/3 approximately equals 0.6666667. We need to round to the nearest tenth which is 0.7. So, we are left with 35.7.