Could someone please help me?

If $13,376.39 was the interest earned on lending $100,400.00 for 8 years, what was the quarterly compounding nominal interest rate charged on the loan?

A bank charges Solid Co. an interest rate of 4.75% compounded quarterly on its line of credit. If the effective interest rate increased by 0.75%, calculate the new interest rate compounded quarterly.

A manufacturing company has 170 production people, 20 quality inspectors, 16 sales people, 7 marketing people, and 30 people in other departments such as HR, Finance, etc.

a.What percent of the total employees are quality inspectors?

Round to two decimal places

b.If 5.88% of the production people quit their jobs, what percent of the total remaining employees are quality inspectors?

Lucy's portfolio of shares comprised of investments of $9,400 in the telecommunications industry and $13,200 in the information technology industry. The market price of her telecommunications shares decreased by 45% and that of information technology increased by 60%.

a.Calculate the total market value of her investments after the changes.

Round to the nearest cent

b.By what percent did the total market value of her investments change?

%