Try another version of this question Heather invested a principal of `$400` ` ` in her bank account with interest rate `5%` How much interest did she earn in `4` months` `` ` ? Box 1: Enter your answer as an integer or decimal number. Examples: 3, -4, 5.5172
She earned $ in interest.
If necessary, round to the nearest cent.
Enter DNE for Does Not Exist, oo for Infinity $6.67