Sergio has decided to diversify his investments in the following way: $4,000 in an account earning 3.2% simple interest$4,000 in a savings account earning 2.1% interest compounded annually$7,500 in a certificate of deposit earning 5% interest compounded quarterlyhow much total interest will sergio earn on his investments at the end of 4 years?

$1,208.28

Step-by-step explanation:

Formula we use here :-

Simple interest :

Compound amount :

Compound amount(Compounded quarterly):-

where P is the principal amount , r is the rate of interest( in decimal) and t is the time.

1) $4,000 in an account earning 3.2% simple interest

Simple interest :

2) $4,000 in a savings account earning 2.1% interest compounded annually

Compound Amount :-

Compound interest :

3) $7,500 in a certificate of deposit earning 5% interest compounded quarterly

Compound Amount :-

Compound interest :

Now, the total interest :

Hence, the total interest will sergio earn on his investments at the end of 4 years = $1,208.28

i think the answer is b)

step-by-step explanation: