What is the domain of the relation below

Plz i want answer and i would appreciate it is is a b c or d

What are the relative frequencies to the nearest hundredth of the columns of the two-way table?

Beth took out a $20,000 loan for college she is borrowing money from two banks. bank a charges an interest rate of 8.5% bank b charges and interest rate of 10.5% after one year alice owes $1860 in interest how much money did she borrow from bank a