Three points, a, b, and c exists in space such that b is "between" a and c. it is known that ab=7, bc=4, and ac=9. are points a, b, and c collinear? give a written explanation, supported by mathematical evidence, for your answer.

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.