Work out the curved surface area of the frustum A frustum is made by removing a small cone from the top of a large one.
In the diagram shown, the height of the small cone is half the height of the large cone.
Work out the curved surface area of the frustum.

Which of those sequences is a geometric sequence

Complex numbers multiply √-4 * √-25 and show all intermediate steps. alternative notation is sqrt(-4) * sqrt(-25).

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.