What is the principal (to the nearest whole dollar) remaining after 36 monthly payments have been made on a $40,000 five-year loan? The annual interest rate is 12% nominal compounded monthly. Your monthly mortgage payment (principle plus interest)is $1, 400. If you have a 15-year loan with a fixed interest rate of 0.6% per month, how much did you borrow from the bank to purchase your house (rounded to the nearest whole dollar)? A company has determined that the price and monthly demand of one of its products are related by the equation D = squareroot 1100 -p where p is the price per unit in dollars and D is the monthly demand in units. The associated fixed costs are S950 per month, and the variable costs are $908 per unit. What is the optimal number of units (rounded to the next whole number) that should be produced and sold each month