George is an avid plant lover and is concerned about the lack of daffodils that grow in his backyard. He finds the growth of the daffodils,G

, is dependent on the percent of aluminum measured in the soil,x

,and can be modeled by the function

G(x)=164x.

What percent of aluminumin the soil must there be for the daffodils to grow onlyby5

centimeters?

• Round your final answer to the nearest whole number.