Question

1. a submarine is descending to examine the seafloor 2,100 feet below the surface. it takes the submarine 2 hours to make this descent. write an equation to represent the relationship between the submarine’s elevation and time.

Explanation:

Step1: Define variables

Let $t$ = time (hours), $E$ = elevation (feet)

Step2: Find descent rate

$\text{Rate} = \frac{2100}{2} = 1050$ feet/hour

Step3: Set up elevation equation

Elevation starts at 0, decreases over time:
$E = -1050t$

Answer:

$E = -1050t$
(where $E$ is the submarine's elevation in feet, and $t$ is time in hours)