2. Write down the percentage changes corresponding to the following scale factors: (a) 1.04 (b) 0.86 3. A student discount card reduces a bill in a restaurant from $124 to $80.60. Work out the percentage discount. 4. A man deposited $1000 in a bank. In return he got $1331. Bank gave interest 10% per year. How long did he kept the money in the bank? 5. A man takes a loan of $10,000 at a compound interest rate of 10% per year. (i) Find the amount after 1 year. (ii) Find the compound interest for 2 years (iii) Find the difference between the compound interest and simple interest at the same rate for 2 years. A principal of $10 is invested at 12% interest for 6 months. Determine the future value if the interest compounded quarterly