10 seconds into a race, clara was at the 25 meter mark. at 60 seconds into the race, she was at the 100 meter mark. what was the approximate rate of change in clara's speed between 10 seconds and 60 seconds? a) .6 meters per second b) 1.5 meters per second c) 2 meters per second d) 7.5 meters per second

B) 1.5 meters per second

Step-by-step explanation:

The rate of change in Clara's speed between 10 and 60 seconds can be calculate as:

Where is the mark at 60 seconds, is the mark at10 seconds,   is the 60 seconds and is 10 seconds.

Replacing values, we get:

So, the speed between 10 and 60 seconds is 1.5 meters per second

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