Rounding in the calculation of monthly interest rates is discouraged. such rounding can lead to answers different from those presented here. for long-term loans, the differences may be pronounced. several years ago bill got a home mortgage of $125,000 with a term of 30 years at an apr of 9%. use the monthly payments for long-term loans rule of thumb to estimate his monthly payment. $ compare this estimate with what the monthly payment formula gives. (round your answer to the nearest integer.)