math (SIMPLE INTEREST)

1.find
a)simple interest earned
b) simple amount

for the following investment

i)RM20000 for 4 years 6 months at 11% per annum

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  1. I = PRT
    = 20000(.11)(4.5)
    = 9900

    so amount = 20000+9900
    = ....

    (4 years, and 6 months = 4.6 years)

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