Supplementary angles add up to 180°
-> The measure of an angle that is supplementary to a 71° angle is 180° - 71° = 129°
Knowing that it is a quarterly rate, we know that there are 20 quarters in 5 years:
20(1.05(x)) = 7500
21x = 7500
x = 357.14
You should deposit about $357.14
Try 360/25. ;) lemme know if this helps.
