1. Logarithm/Algebra?

Hi there, could someone please help me with the following:

The answer is 10%, but I want to know how you get that 10%.

Once again, I am unsure of as to what you do with the power when you move the equation across. Please could someone help!

Thank you.

Equation: Solve for r2

$826.45 =$1000 / (1 + r2)2

r2 = 10%

2. Re: Logarithm/Algebra?

$(1+r_2)^2=\frac{1000}{826.45}$

$(1+r_2)^2 \approx 1.21$

$1+r_2 \approx 1.0999$

$r_2 \approx 0.0999$