Please help me to solve this with full explanation step by step

[amay79599]

Please explain it step by step

 

[blamocur]

Step #1 :

From Read Before Posting: Show your beginning work, or ask a specific question about the exercise, or explain why you're stuck.

 

[Dr.Peterson]

Please explain it step by step

How would the integral relate to areas on the graph? What are those areas? Give it a try.

 

[Steven G]

What information would the answer of that integral give you?