Question

A deep sea diving bell is being lowered at a constant rate. After 12 ​minutes, the bell is at a depth of 400 ft. After 50 minutes the bell is at a depth of 2 comma 000 ft. What is the average rate of lowering per​ minute? Round to the nearest hundredth.

Answer 1

The average rate of lowering per minute is approximately 42.11 ft/min.

Step-by-step explanation:

To find the average rate of lowering per minute, we can use the formula for the average rate:

Rate = (change in depth) / (change in time)

First, we need to calculate the change in depth and change in time:

Change in depth = Final depth - Initial depth = 2000 ft - 400 ft = 1600 ft

Change in time = 50 min - 12 min = 38 min

Now, we can calculate the average rate:

Rate = Change in depth / Change in time = 1600 ft / 38 min ≈ 42.11 ft/min

Therefore, the average rate of lowering per minute is approximately 42.11 ft/min.

Answer 2

Answer: After 50 minutes the bell is at a depth of 2000 ft so we can find the average rate by

2000/50 =40 ft per minute.

We ignore the 400 ft in 12 minutes because that is included when we take out the average at 50 minutes and adding it in would be an error of doubly entry.

Step-by-step explanation: