the amount obtained at the end of second year. (b) interest for third year. ad the compound interest on 1000 at \( 8 \% \) per annum for \( 1 \frac{1}{2} \) years while the interest is compounded arly.

Think and practise Then, it reduced it by \( 30 \% \) because it wanted to go back to the original price. Let's check if this is correct: a) A computer originally cost \( € 1000 \). How much did it cost at each stage of the process? b) What is the percentage variation in relation 70 to the original price?

An initial investment of \( \$ 480 \) is appreciated for 8 years in an account that earns \( 12 \% \) interest, compounded quarterly. Find the amount of money in the account at the end of the period.

4. If a business's revenue is \( \$ 3,421.31 \) and its COGS is \( \$ 921.62 \), what is the profit? A. \( \$ 2,499.69 \) B. \( \$ 4,342.93 \) C. \( \$ 2,299.69 \) D. \( \$ 4,499.69 \)

9. Цену на товар снизили на \( 20 \% \), через месяц - еще на \( 10 \% \), после чего товар стал стоить 216 рублей. Какова первона- чальная стоимость товара?

3. Using a margin rate of \( 35 \% \), what is an item's retail price be if the cost is \( \$ 10 \) ? A. \( \$ 6.50 \) B. \( \$ 12.00 \) C. \( \$ 12.50 \) D. \( \$ 13.50 \)