State Bank made a loan at 12% interest for 360 days. If the amount of interest was $934.20, use the ordinary interest method to find the amount of principal borrowed.

If 360 days counts as a year, then you want P such that

0.12*P = 934.20

If a year is counted as 365 days, then

0.12*(360/365)*P = 934.20

Note:

Ordinary interest method is based 360 days in a year.
Exact interest method is based on 365 days in a year.

To find the amount of principal borrowed using the ordinary interest method, you would need to use the formula:

Interest = Principal x Rate x Time

In this case, the interest is given as $934.20, the rate is 12% (or 0.12), and the time is 360 days.

Rearranging the formula to solve for the principal (P):

Principal = Interest / (Rate x Time)

Substituting the given values:

Principal = $934.20 / (0.12 x 360)

Principal = $934.20 / 43.2

Principal = $21,562.50

Therefore, the amount of principal borrowed by the State Bank is $21,562.50.

To find the amount of principal borrowed using the ordinary interest method, we need to use the formula:

Interest = Principal * Rate * Time

In this case, we are given the values for interest ($934.20), rate (12%), and time (360 days).

Let's solve the equation for Principal:

Principal = Interest / (Rate * Time)

Substituting the given values:

Principal = $934.20 / (0.12 * 360)

Principal = $934.20 / 43.2

Principal ≈ $21,586.11

Therefore, the amount of principal borrowed from State Bank is approximately $21,586.11.