What is the completely factored form of d4 -8d2 + 16

Write the rational number in lowest terms 99/-15

Aright cylinder has a diameter of 8 m and a height of 6m. what is the volume of the cylinder

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?