7. The average yield of rice planted in Qingshan Village in 200 1 year was 7,200 kg/ha, and in 2003 it was 8,450 kg/ha, so as to seek the average annual growth rate of rice yield per ha.

Solution: Assuming that the average annual growth rate of rice yield per hectare is X,

Can Equation 7200( 1+x) be listed according to the meaning of the question? =8450

Divide 7200 by the right to get x =112, and then turn it into a percentage.