interest is calculated by ____.
Aadding the interest rate to the principal
b)multiplying the principal by the interest rate
Cmultiplying the principal by the interest rate and the time
Dmultiplying the principal by the interest rate and dividing by the time
Aadding the interest rate to the principal
Cmultiplying the principal by the interest rate and the time
Dmultiplying the principal by the interest rate and dividing by the time