Pls tell me what I did wrong in this. I don’t understand

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!

The radius of a sphere is 3 inches. which represents the volume of the sphere?

A(1,1) b(-3,0) c(-4,-1) d(3,-2) drag it to correct position