compound interest questions, why dont these work out?

CarolynH

New member
Ive been at these problems for hours and i still cant solve them. Im in Finite math

the question is:
what is the present value of $50,000 in 10 years at 12% interest compounded monthly?
ive typed in F= 50,000(1+.12/12) ^12(10)
The answer im getting is 165019.34
but the book says answer is 15149.74

another question is :
college expenses at a private college currently average $12000 per year. It is estimated that these expenses are increasing at the rate of 1% per month.. what is the estimated cost of college 10 years from now.

ive set it up to f=12,000(1+.01/1)^10
the book says the answer is 39604.64


can some one help me figure out what im doing so wrong? ive used many websites and still im doing something wrong.
 
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