If $30660.00 $LaTeX: \displaystyle dollars is invested at 1.8% simple interest for 15 years, how much interest is earned and what is the new account balance? </p>$

Using $LaTeX: \displaystyle I = P\cdot r \cdot t = (30660)(0.018)(15) = 8278.20$ . The account balance is $LaTeX: \displaystyle P + I = 30660 + 8278.2 = 38938.20$