[填空题]
At the beginning of each year, Javr:n/hddjr2f wd8edg2h :1 4eck invests 5000 in a sav rn9b* ;t9g h-cgr/nemings account that pays 4% annual interest,n9e9b/ gm; rrn chg*t- compounded quarterly
1.Find the number of years it will take until Jack has 100000 in his account.
Hence it will take years until Jack has 100000 in his account.
At the beginning of each year, John invests 6000 in a savings account that pays an annual interest rate, compounded semi-annually. After 20 years John has 200000 in his account.
2.Find the annual interest rate.
Hence the annual interest rate is %
