At a certain rate of compound interest, money will double in years, money will triple in years, and money will increase tenfold in years. At this same rate of compound interest, 5 will increase to 18 in n years. Find integers a,b, and c so that n=a+b+c. a= b= c= On March 1, 1993, Mr. Hernandez deposited $4,200 into an account that used a 4% annual effective interest rate when the balance was under $5,000 and a 5.5% annual effective interest rate when the balance is at least 5,000. Mr. Hernandez withdrew 1,000 on March 1, 1999. If there were no other deposits or withdrawals, find Mr. Hernandez's account balance on March 1, 2003. (Round your answer to the nearest cent.) Mr. Hernandez's account balance on March 1, 2003 is