Item 21
You know that 15% of a number n is 12. How can you use this to find 30% of n? 45% of n? Explain.

Because 30% of n is equal to
times 15% of n and 45% of n is equal to
times 15% of n, you can write

30% of n=
×12=

and

45% of n=
×12=
.

Which is the solution to the inequality? 2 3/52 1/15 b< 3 2/15 b> 3 2/15

Two angles are complementary. the larger angle is 36 more than the smaller angle. what is the measure of the larger angle?

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.