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September 21, 2014

September 21, 2014

Posted by **steve** on Thursday, February 7, 2013 at 9:54am.

1.solve for x: 0.34=1/(1+x)carrot3

2.If you buy a share of stock for $15 and sell it 2 years later for $18.50, what is the annual percentage return (on a compound basis) that you received for your investment?

and thank you for your help.

- math -
**Steve**, Thursday, February 7, 2013 at 10:30amfirst, it's "caret" not "carrot"

since 3 = 1/3.333, I'll just use 3 for 1/3.4:

0.34 = 1/(1+x)^3

(1+x)^3 = 1/.34 = 3

1+x = ∛3

x = ∛3 - 1

For interest rate, just use the good old formula

A = P(1+r/n)^(nt)

18.50 = 15(1+r)^2

r = .11 = 11%

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