Martha's clubhouse is shaped like a square pyramid with four congruent equilateral triangles for its sides.
All of the edges are 6 feet long. What is the total
surface area of the clubhouse including the floor?
Round your answer to the nearest hundredth.

Use the normal approximation to the binomial distribution to answer this question. fifteen percent of all students at a large university are absent on mondays. if a random sample of 12 names is called on a monday, what is the probability that four students are absent?

Consider a bag that contains 220 coins of which 6 are rare indian pennies. for the given pair of events a and b, complete parts (a) and (b) below. a: when one of the 220 coins is randomly selected, it is one of the 6 indian pennies. b: when another one of the 220 coins is randomly selected (with replacement), it is also one of the 6 indian pennies. a. determine whether events a and b are independent or dependent. b. find p(a and b), the probability that events a and b both occur.

Find the area of the region that is inside r=3cos(theta) and outside r=2-cos(theta). sketch the curves.