Question

1. from sea level, a submarine descends 45 feet every minute. what number represents where the submarine is after 7 minutes? -315 feet -122 feet -52 feet -285 feet

Explanation:

Step1: Identify the rate and time

The submarine descends 45 feet per minute and the time is 7 minutes.

Step2: Calculate the total descent

We use the formula: distance = rate×time. So the distance of descent is $45\times7 = 315$ feet. Since it is descending (going down from sea - level), the position is represented by a negative number, - 315 feet.

Answer:

-315 feet