Question

A rock sinks 160 feet in 20 minutes. What's the average rate of change per second?

a) 8 feet per minute

b) 4 feet per minute

c) 2 feet per minute

d) 6 feet per minute

Answer 1

The average rate of change per second for the rock sinking 160 feet in 20 minutes is approximately 0.133 feet per second.

Step-by-step explanation:

To find the average rate of change per second, we need to convert the given sinking distance and time into feet per second. There are 60 seconds in a minute, so the rock sank 160 feet in 20 minutes. We can divide 160 by 20 to find that the rock sunk 8 feet per minute. To find the average rate of change per second, we divide 8 by 60 (since there are 60 seconds in a minute). So, the average rate of change per second is approximately 0.133 feet per second.