[填空题]
Melinda has 300000 iv*3 l+tm xo54rwlvke3n a private foundation. Eaanat c4 lf5 +g3zyr(6dch year she donates 10% of the money remaining in her private founda zrfn+56y(g a3a cld4ttion to charity.
1.Find the maximum number of years Melinda can donate to charity while keeping at least 100000 in the private foundation.
Hence the maximum number of years is .
Bill invests $400000 in a bank account that pays a nominal interest rate of 4 %, compounded quarterly, for ten years.
2.Calculate the value of Bill's investment at the end of this time. Give your answer correct to the nearest dollar.
FV≈ .
