Section 6.1 [ATTACH=full]1574[/ATTACH] [ATTACH=full]1575[/ATTACH] [ATTACH=full]1576[/ATTACH] [ATTACH=full]1577[/ATTACH] [ATTACH=full]1578[/ATTACH] [ATTACH=full]1579[/ATTACH] The answer for a should be 0.62. What did I do wrong?