From 3:27.29 to 3:28.12 the plane dropped altitude from 3190 ft. to 1670 ft.
Calculate the angle of descent (C) if the plane
traveled 1 mile. Round your answer to the nearest
hundredth (second decimal place).
(1 mile = 5280 feet)

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?