4)The diagram shows a circle inside a semicircle. The semicircle ABC has centre O and radius 9 cm. The circle has diameter OB. Calculate, in cm2, the shaded area.

Give your answer to 3 significant figures.

If n-9 is an even number what are the next three consecutive intergers

Asquare has a side that measures 11 units. what is the area of a circle with a circumference that equals the perimeter of the square? use 3.14 for π, and round your answer to the nearest hundredth. 1519.76 units2 379.94 units2 616.56 units2 154.14 units2

Vanessa earns a base salary of $400.00 every week with an additional5% commission on everything she sells. vanessa sold $1650.00 worth of items last week.