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March 4, 2015

March 4, 2015

Posted by **CrissyXD** on Wednesday, March 28, 2012 at 2:32am.

Effie is planning to set up a trust fund for her new grand daughter. In 18 years time she wants the investment to be worth $50000 to help her buy a car or a home unit.

a)How much should she invest at 5% p.a. compounding yearly?

--I know the answer for this is $20776.03

b) How much less will she have to invest at 6% p.a., compounding monthly?

This is the question I need help with...

Does anyone know the working out and answer? thank you

- Math -
**Reiny**, Wednesday, March 28, 2012 at 8:12amlet her present investment be P

P(1.05)^18 = 50000

P = 50000/(1.05)^18 = 20776.03

for the 2nd part,

monthly rate = .06/12 = .005, but the exponent = 12x18 = 216

P = 50000/1.005^216 = 17025.53

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