Question

A submarine started at 750 meters below sea level. It rose 50 meters per hour over a 4-hour period. Which expression represents the new position of the submarine in relation to sea level?

Answer 1

im pretty sure it's -750 + 4 x 50

Explanation:

This is the only answer that really makes sense to me

Answer 2

`y(t) = 750 -50t`

Explanation:

We want to model the position of the submarine as a function of time.

Notice that we have a constant amount. The initial depth: 750 meters

Then we have a factor that varies over time. Every hour the submarine ascends 50 meters. therefore as t increases the depth y(t) of the submarine decreases. Then the factor is:

-50t.

Where t represents the time in hours.

Then the equation that represents the new position of the submarine in relation to the level of the sea:

`y(t) = 750 -50t`