Saving account has a principal of 1,800.00 it earns 6 percent interest compounded semiannually. How much is the compound interest after 1 year

First find the future value

A=p (1+r/k) ^kt

A future value?

P principle 1800

R interest rate 0.06

K compounded semiannual 2

T time 1 year

A=1,800 * (1+0.06:2) ^ (2*1)

A=1,909.62

Now find the compound interest

I=A-p

I=1,909.62-1,800

I=109.62