OABCDE is a regular hexagon. With O as origin the position vector of C is c and the position vector of D is d.
(a) Find, in terms of c and d,
i) DC,
ii) OE
iii) the position vector of B.
(b) The sides of the hexagon are each of length 8 cm.
Calculate
i) the size of angle ABC,
ii) the area of triangle ABC,
iii) the length of the straight line AC,
iv) the area of the hexagon.

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According to a study done by de anza students, the height for asian adult males is normally distributed with an average of 66 inches and a standard deviation of 2.5 inches. suppose one asian adult male is randomly chosen. let x = height of the individual. a) give the distribution of x. x ~ b) find the probability that the person is between 64 and 69 inches. write the probability statement. what is the probability?