Sharla's initial investment will earn $352 over the 16 year period.
Formula for simple interest is;
I = PRT/100
Now, we are given;
Principal; P = $275
Rate; R = 8
Time; T = 16
Thus;
I = 275 * 8 * 16/100
I = $352
Thus, Sharla's initial investment will earn $352 over the 16 year period.
Read more about Simple Interest at; https://brainly.com/question/20690803
#SPJ1