Answer:
a. Notes Value = 5000
Interest = 6%
Days/Months = 90 Days
Months = 3
Annual Interest= 5000*6/100
Annual Interest = $300
Interest =300*3/12
Interest = $75
b. Notes Value = 800
Interest = 9%
Days/Months = 5 Months
Months = 5
Annual Interest = 800*9/100 = $72
Interest =72*5/12 = $30
c. Notes Value = 6000
Interest = 8%
Days/Months = 60 Days
Months = 2
Annual interest = 6000*8/100 = $480
Interest = 480*2/12
Interest = $80