$11,000, invested for 9 years at 3% compounded quarterly.

Answer 1

P = Po(1+r)^n

Po = $11,000

r = (3%/4)/100% = 0.0075 = Quarterly
% rate expressed as a decimal.

n = 4comp./yr. * 9yrs. = 36 Compounding
periods.

Plug the above values into the given Eq
and solve for P(principal).