Question 321142
Donna invested her $33,000 bonus and received a total of $970 in interest after one year. 

let her invest $ x at 4% and 
$ 33000-x at  2.25%, 
..
Interest equation
0.04x+0.0225(33000-x)= 970
0.04x+742.5-0.0225x=970
0.0175x= 227.5
 x= $13000 investment at 4  %
Balance $2000 at 2.25%