14. AB and CD are respectively arcs of two concentric circles of radii 21 cm and 7 cm and centre 0 (see Fig. 12.33). If Angle AOB = 30°, find the area of the
shaded region.

Your friend swims on the school team. in his first four races, his times are 24.7, 23.5, 25.6, and 27.2 seconds. which time listed for his next race would make the range larger?

Taylor wants to paint his rectangular deck that is 41 feet long and 24 feet wide. a gallon of paint covers about 350 square feet. how many gallons of paint will taylor need to cover the entire deck? round your answers to two decimal places when necessary.

In the sixth grade 13 out of 20 students have a dog if there are 152 sixth grade students how many of them have a dog