Select the correct answer.
Which number is a rational number?

The perimeter of a movie screen is 54 meters. the screen is 18 meters wide. how tall is it?

What is the value of x when x + 7 = 21?

Question 5 of 10 2 points if a population is a sample of the population could be a. registered voters; all citizens o o b. baptists; all religious people o c. people who purchased shoes; all customers o d. the entire school faculty; math teachers