How do you find the missing length of a triangle given 2 angles and 1 side length? (looks like this)

Evaluate 4 a for a = 5 2/3 . express your answer in simplest form.

Varies inversely with x. if y=8.5 when x=-1 find x when y=-1

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.