Dara is saving for his child's education. He assumes the total cost will be $$250,000$ when their child begins college in $18$ years. Dara presently has $$70,000$ to invest. What annual rate of interest must Dara earn on the investment to cover the cost of his child's education?

$7\mathrm{.}33\%$

$357\mathrm{.}14\%$

$0\mathrm{.}59\%$

$-6\mathrm{.}83\%$