Every student in the 6th grade at ps 500 must read exactly three of the principal's four
favorite books. if 34 read math for fun, 36 read everyone loves math, 38 read cool math, and 12 read math is for me, how many students are in the 6th grade at ps 500?

What is the rotational symmetry of a wheel

The administrator of a large assisted living facility wanted to know the average age of the residents living at the facility. he randomly selected 12 residents and determined their age, listed here: 80, 65, 75, 83, 68, 73, 88, 79, 94, 72, 79, 68 what's the average age of the sample of residents? a. 79 years old b. 68 years old c. 75 years old d. 77 years old

Percent increase and decrease. original number: 45 new number: 18