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secondary 4 | E Maths

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Can someone explain to me whr they got the $500 from ? Question 43b

5% x 2500 x 4 =? Work that out and you will understand

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b)ben::: calculate the amount he invested and then.. What he exchange into Usd now..

This amount of Usd is to be converted back to Sgd and the total is what he has.(p.s. typo error on the paper..they should write down Been instead of Harry)

c)use formulae in a) to solve part c)

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