Asia desai deposited $6,000 in a savings account that pays 5.5% interest compounded daily. how much interest did she earn in 21 days?

21 days = 21/365 years = 0.0575342466 years
n = compounding periods per year = 365

Total = Principal * (1 + rate/n)^n*years
Total = $6,000 * (1+ (.055/365))^365*0.0575342466
Total = $6,000 * (1+ 0.0001506849 )^21
Total = $6,000 * 1.00316915570
Total = $6,019.01