4. B and Care points on a circle, centre O. TCD is a tangent to the circle.
Angle BAC = 54
NOT TO
SCALE
D
(a) Find angle BOC, giving a reason for your answer.
(b) When is the origin, the position vector of point Cis

The equation respenting the left table is

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Assume that adults have iq scores that are normally distributed with a mean of mu equals 100 and a standard deviation sigma equals 20. find the probability that a randomly selected adult has an iq between 80 and 120.assume that adults have iq scores that are normally distributed with a mean of mu equals 100 and a standard deviation sigma equals 20. find the probability that a randomly selected adult has an iq between 80 and 120.