What is a Set closed under multiplication?

What does t equal in the equation 7t-t equals 54? What is 18.4 rounded to the nearest one? Does a revo 3.3 have reverse? How many degrees is one degree f are one degree c? What is the answer to if a square has 25cm how long is 1 side? How long would it take to travel 73 miles if you travel at speed of A miles per hour? When is a nose longer than a foot? When a right prism with a base perimeter of 8 units a height of 3 units and a total base area of 11 square units has a surface area of square units? What is 20 percent off of 699.99? Which number can be written as a fraction plq where p and q are integers and q is not equal to zero? How many quarts are in 567 grams? How many 6 go into 37? How many minutes in the longest day of the year? What is 7.50 multiplied by 80? What are the interior and exterior angles of a regular pentagon? How do you find the average final mark? What are the solutions to the equation 2x 3 4 equals 17? If your carpet costs 11.69 per square yard how much does it cost per square foot? What is a real world problem that involves a percent? What is a number that is odd and it's a perfect number?