(1) find the principal amount invested if the amount in a quarterly compounded account with a 3.07% interest rate is $5,993.69 after 66 months.
(2) a bank loans a customer $66,000 for a period of 5 years. the simple interest rate of the loan is 10.5%. what is the total amount that the customer will need to pay the bank over the 5 years

step-by-step explanation:

42.4

step-by-step explanation:

convert to decimal

option (b) is correct

step-by-step explanation:

to find the solution of this system, we need to convert it into reduced row-echelon form. we have,

after applying row operations r2 -> r2/2 and r3 -> r3/3, we get,

answer is c

step-by-step explanation:

81/12=324/x

x=48