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Math  /  Numbers & Operations

Question13. A submarine descends to a depth of 660 feet below the surface in 11 minutes. At this rate, what integer represents the change, in feet, of the submarine's position after one minute? (Example 2)

Studdy Solution

STEP 1

1. The submarine descends at a constant rate.
2. The total depth descended is 660 660 feet.
3. The total time taken for the descent is 11 11 minutes.
4. We need to find the change in depth per minute.

STEP 2

1. Define the variables.
2. Set up the equation.
3. Solve for the rate of descent.

STEP 3

Let r r represent the rate of descent in feet per minute.

STEP 4

Set up the equation based on the total descent and time.
The total descent is 660 660 feet in 11 11 minutes, so:
660=11×r 660 = 11 \times r

STEP 5

Solve for r r by dividing both sides by 11 11 .
r=66011 r = \frac{660}{11}

STEP 6

Calculate the rate of descent.
r=60 r = 60
The integer representing the change in feet of the submarine's position after one minute is:
60 feet per minute\boxed{60 \text{ feet per minute}}

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