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Question Progress
Exam Paper Progress
35/80 Marks
Grade For This Paper
U 1 2 3
The diagram shows a square ABCD with sides of length 20 cm.
It also shows a semicircle and arc of a circle.
AB is the diameter of the semicircle.
BD is an arc of a circle with centre A.
a) Find the area of the shaded region giving your answer
in terms of it.
You must show your working, clearly stating the area
of the semicircle.
A
20 cm
Area of shaded region
Area of square
Total marks: 4

Circle a has a diameter of 7 inches, a circumference of 21.98 inches, and an area of 38.465 square inches. the diameter of circle b is 6 inches, the circumference is 18.84 inches, and the area is 28.26 square inches. part a: using the formula for circumference, solve for the value of pi for each circle. (4 points) part b: use the formula for area and solve for the value of pi for each circle. (4 points)

Apoll is being conducted at a mall nothingto obtain a sample of the population of an entire country. what is the frame for this type of​ sampling? who would be excluded from the survey and how might this affect the results of the​ survey? what is the frame for this type of​ sampling? a. the frame is people who need new clothes. b. the frame is people who shop at the mall. c. the frame is people who like to shop. d. the frame is the entire population of the country. who would be excluded from the survey and how might this affect the results of the​ survey? a. any person that does not need new clothes is excluded. this could result in sampling bias due to undercoverage. b. any person who does not shop at the mall is excluded. this could result in sampling bias due to undercoverage. c. any person who does not shop at the mall is excluded. this could result in nonresponse bias due to people not participating in the poll. d. there is nobody that is being excluded from the survey.

Which angle of rotation is an angle of rotational symmetry for all figures?