I'm not sure what the answer is. If you know, please help me out.
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8.74 rounded to the nearest whole number

Which angle has the same measure as the dehedral angle formed by the orange face and the purple rectangle

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 less than 132. the probability that a randomly selected adult has an iq less than 132 is?