​Mortgage Amount: $146,800.00 ​APR: 5.25 percent ​Term: 30 years ​a. Calculate the monthly payment: $______ ​ ​b. Calculate the total interest paid: $______

divide 146800.00 by 30 to get yearly and then by 12 to get monthly
146800/30/12=407.78

times that by 1.0525 for the monthly interest payment 429.19 is your first answer.

for total interest paid 146800*1.0525= 223870-146800=77,070 the second one which is the answer for hope this helps