
Solve It! Most numbers on a telephone keypad correspond to a set of letters. Suppose you're friend is using the keypad to encrypt a secret message. He sends you the string of characters 4 6 6 3 in that order. What is one word he might be trying to send?

Problem 1 Got It?

Problem 2 Got It?
Problem 3 Got It? What are the subsets of the set P = {a, b}?
Select all that apply.
Problem 3 Got It? What are the subsets of the set S = {a, b, c}?
Select all that apply.
Problem 3 Got It? Reasoning: Let A = {x | x < -3} and B = {x | x ≤ 0}. Is A a subset of B?
Problem 3 Got It? Reasoning: Explain your reasoning on the previous item.

Problem 4 Got It?