(Compound Interest and Geometric Sequences LC) The equation A=P(1+40.07)4t represents the amount of money earned on a compound interest savings account with an annual interest rate of 7% compounded quarterly. If after 15 years the amount in the account is $13,997.55, what is the value of the principal investment? Round the answer to the nearest hundredths place. $13,059.12 $10,790.34 $9,054.59 $4,942.96