Aspherical mini donut hole has a diameter of 6 centimeters. a large spherical donut hole has a diameter of 9 centimeters. approximately how much greater is the volume of a large donut hole than the volume of a mini donut hole?

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!