Question

Starting at sea level, a submarine descended at a constant rate to a depth of − 4/5 mile relative to sea level in 3 minutes.

What was the submarine's depth relative to sea level after the first minute?

Answer 1

if it were 4 then it would be 1 1/3 for one minute

Answer 2

`\texttt{Submarine's depth relative to sea level after the first minute = }-(4)/(15) miles`

Explanation:

Starting at sea level, a submarine descended at a constant rate to a depth of −4/5 mile relative to sea level in 3 minutes.

Total time = 3 minutes

`[tex]\texttt{Total depth descended in 3 minutes = }-(4)/(5)miles`[/tex]

We need to find what was the submarine's depth relative to sea level after the first minute,

`\texttt{Depth descended in per minute = }-((4)/(5))/(3)=-(4)/(15)miles`

`\texttt{Submarine's depth relative to sea level after the first minute = }-(4)/(15)* 1=-(4)/(15) miles\\\\\texttt{Submarine's depth relative to sea level after the first minute = }-(4)/(15) miles`