can someone answer these questions and show working ?

Questions: 1. Calculate the price of the following items; (a) the selling price of a pair of boots purchased for $230 and sold with a profit increase of 30% (b) the original price of a gold necklace, on sale for $150 after a 44% discount Kelly borrowed $2000 from his brother with a simple interest rate of 15%p.a. How much interest will he have to pay if the loan is for 3 years? Stella invests 37000 in a business that offers 4.5% p.a. interest. compounding monthly. How much interest will Stella earn on her investment after 5 years? Which is the hotter deal... $740 invested for 9 months with 7%p.a. simple interest or 6.5%p.a. compounding weekly? Justify your answer Calculate the annual interest rate1 as a percentage correct to 2 decimal places. for an investment to double in 4- years if compounding annually Sonia needs her house repainted. but it will cost $14 000. A company offers to paint it provided she pays 10% deposit and 10%p.a. simple interest on the balance. If she agrees to equal monthly repayments over 2 years: (a) how much are the monthly repayments? ([1) how much extra did Sonia pay by agreeing to this deal? Page 1 of 2 Below are the nominal interest rates offered by 3 major banks: Bank A: 8.75%p.a. compounding quarterly Bank B: 8.7%p.a. compounding fortnightly Bank C: B.65%p.a. compounding daily Calculate the effective interest rates for each and determine which ban]: you would be best to invest with. The recurrence relation below expresses the amount owing on a reducing balance loan where interest is calculated monthly and T" is the amount owing after the nth monthly repayment... T.\" = 1.0171. 300 _ where Tn = 5500 (1) (1) (1) (2} (3) (2) (2) (1) (2)