Solve 9 a please​

Carson has only $20 bills and $10 bill in her wallet. the total value of the bills is $50. she has 1 more $20 bill than $10 bills. how many each kind of bill does carson have? a. one $20 and two $10 bills b. two $20 bills and one $10 bill c. one $20 bills and three $10 bills d. two $20 bills and two $10 bills

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

What is the area of the original rectangle? 8 cm² 20 cm² 25 cm² 40 cm²