Question

Last year, Felipe invested his money in two purchases. He purchased a certificate of deposit for $12,000 that paid 6% interest per year and purchased $4000 in corporate bonds paying 5% interest per year. Answer the questions below.
Do not do any rounding.
(a) What was the total interest earned at the end of 1 year?
$
(b) What was the percent interest for his total investment?
%

Answer 1

Same as the other one

part A)

CD 12,000 at 6%, how much is that?  (6/100) * 12000

CB 4000 at 5%, how much is that?  (5/100) * 4000

part B)

total investment was 12000 + 4000 = 16000

the earned interest above are 720 and 200 respectively

total yield was, 720 + 200 = 920

if 16000 is the 100%, how much is 920 in percentage?

$\bf \begin{array}{ccllll} amount&\%\\ \text{\textemdash\textemdash\textemdash}&\text{\textemdash\textemdash\textemdash}\\ 16000&100\\ 920&x \end{array}\implies \cfrac{16000}{920}=\cfrac{100}{x}$

solve for "x"