$\backslash$table$[[18,400,17,289,715],[21,500,15,430,258]]$

Calculating Interest Rates $($LO$3)$ Assume the total cost of a university education will be $$300,000$ when your child enters university in $18$ years. You currently have $$65,000$ to invest. What annual rate of interest must you earn on your investment to cover the cost of your child's university education?