What is the trigonometric equation that models the height of water as a function of time t in hours after midnight?
low tide: 3:56 AM, 4.56 ft
high tide: 9:59 AM, 38.22 ft

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.