Total profit is defined as total revenue, R(x), minus total cost, C(x), and is given by the function P(x) = R(x) – C(x). Given R(x) = 58x – 0.4x^2 and C(x) = 5x+15 following
a) P(x)
b) R(90), C(90), and P(90)

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.