Question

The expression -360+13.8Z Represents a submarine that began at the death of 360 feet below sea level send it at the rate of 13.8 feet per minute. what was the death of the submarine after seven minutes?

Answer 1

To calculate the submarine's depth after 7 minutes, multiply the ascent rate of 13.8 feet per minute by 7, then add this to the initial depth of -360 feet. The result is -263.4 feet, indicating the submarine's depth after 7 minutes.

Step-by-step explanation:

The expression -360 + 13.8Z represents a submarine's depth in feet below sea level, with Z being the time in minutes. To find the depth of the submarine after 7 minutes, you would substitute 7 for Z in the equation. Here's the step-by-step calculation:

• Start with the initial depth of -360 feet.
• Since the submarine ascends at a rate of 13.8 feet per minute, multiply 13.8 by 7 (the number of minutes).
• Add the result from step 2 to the initial depth.
• -360 + (13.8 * 7) = -360 + 96.6
• The calculation gives us -360 + 96.6 = -263.4 feet.
• Therefore, the submarine's depth after 7 minutes is -263.4 feet below sea level.