The formula for compounding interest annually is $\displaystyle{A}={P}{{\left({1}+{r}\right)}}^{{{t}}}\usepackage{cmbright}\Huge\$ , where A is the balance after t years, P is the original amount invested, and r is the interest rate in decimal form. Find r if $5,000 is invested and grows to $5,304.50 after two years.