Plz tell me the aswer and how you worked it out. a tree grows to a height of 13.75m over 5 1/2 years. what is the average annual growth rate in metres per year?

1. Take your 13.75 and 5 1/2 and put it into a dividing table 
           
     5.5 I13.75               

                              you need to get your decimal out of deviser (5.5) will now be (55) because you moved the decimal over there you also need to move the decimal that is on the inside to and it will be (137.5)

2. When you divide you would get 2.5 

3. Now you would know how much the tree grew over the 5 1/2 years.

ANSWER:  2.5m a year!

Hope this helped! 

:)