An investor purchases 75 shares at 37.90 a share, holds the stock for 150 days, and then sells the stock for 41.20 a share. Find the annual interest rate earned.

principal
under 3000
3000-10,000
over 10,000

commission
32+1.8% of principal
56+1% of principal
106+0.5% of principal

2 answers

What's the answer
3.2%