For what values of theta(0<=theta<=2pi)do maximum r-values occur on the graph the polar equation r = 4 - 3 sin3 theta? Note that the
maximum r-value occurs at a point that is the maximum distance from the pole.
A. Pi/2, 7pi/6, 11pi/6
B. Pi/6, 5pi/6, 3pi/2
C. Pi/3, pi, 5pi/3
D. Pi/6, pi/2, 5pi/6, 7pi/6, 3pi/2, 11pi/6

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?