What is the volume, in cubic inches, of the solid figure? A
6,156 cubic inches
8,100 cubic inches
3,888 cubic inches
B
D
2,268 cubic inches

1. according to the internal revenue service, the mean tax refund for the year 2007 was $2,708. assume the standard deviation is $650 and that the amounts refunded follow a normal probability distribution. a. what percent of the refunds are more than $3,000? b. what percent of the refunds are more than $3,000 but less than $4,000? c. what percent of the refunds are less than $2,000?