There are 30 students in mr. holland music class. if 30% of the students play in the school band, how many students in the class play in the school band?

What is the effect on the graph of the function f(x)=x when f(x) is replaced with -f(x)+4

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 dimensions of the circle. area = 64π in.² r= in.