-2/3a+5/6a-1/6 what would this answer be

Issof claims that the scale factor is 1/2. which statement about his claim is correct

A. 90 degrees b. 45 degrees c. 30 degrees d. 120 degrees

Dakota earned $7.50 in interest in account a and $18.75 in interest in account b after 15 months. if the simple interest rate is 4% for account a and 5% for account b, which account has the greater principal? explain. to make it a little easier, there is an image. good luck!