In a decagon (a polygon with 10 sides), each vertex is joined with every other vertex by a line segment. What is the total number of segments (including the sides of the decagon) ?

circle has a radius of 3. An arc in this circle has a central angle of 20, degrees. What is the length of the arc?

Elli's age in 10 years will be the same as Peggy's age is now. Five years from now, Peggy's age will be twice Elli's age. What are their present ages?

What would be equivalent to 2a-16?

A fair number cube is rolled. what are the odds in favor of rolling a 4

In which set are the numbers equal? A) 1 5, 0.20 and 20% B) 1 2, 0.20 and 50% C) 4 5, 0.60 and 60% D) 1 4, 0.20 and 20%

A square floor has an area of 480 square feet. Kristin wants to put molding around the entire perimeter of the floor. Approximately how much molding does she need? A. 720 feet B. 120 feet C. 90 feet D. 88 feet

What is larger 7 or 24/4

What is 6 cups minus 3 2/5 cups

Make a real world problem with - 3.5<-1.5

An outdoor spa (hot tub) draws 1487 watts to keep the water warm. If the utility company charges $0.13 per kilowatt-hour, how much does it cost to operate the spa for four months during the winter (24 hours per day) ? Assume each month has 30 days.