Hi there
Use the formula of the future value of annuity ordinary
The formula is
Fv=pmt [(1+r)^(n)-1)÷r]
Fv future value 480000
PMT payment per year?
R interest rate 0.06
N time 40 years
First we need to solve for pmt
PMT=Fv÷[(1+r)^(n)-1)÷r]
PMT=480,000÷(((1+0.06)^(40)−1)
÷(0.06))=3,101.54....answer
Good luck!