(1) E.
с
8 cm
ion 6 is 2
(Total for Question 23 is 3 marks)
24
The diagram shows a shape made from a trapezium ABCD and a
semicircle with diameter DC.
DC = 8 cm.
The shape has area 64 cm
The height of the trapezium is 5 cm.
D
Work out the length of AB.
Give your answer correct to 1 decimal place.
5 cm
B
A
2
-)
Area
E-6 = T
2

The fraction of defective integrated circuits produced in a photolithography process is being studied. a random sample of 300 circuits is tested, revealing 17 defectives. (a) calculate a 95% two-sided confidence interval on the fraction of defective circuits produced by this particular tool. round the answers to 4 decimal places. less-than-or-equal-to p less-than-or-equal-to (b) calculate a 95% upper confidence bound on the fraction of defective circuits. round the answer to 4 decimal places. p less-than-or-equal-to