Given sin=-4/5 and x is in quadrant 3, what is the value of tan x/2

Morning guys i got some questions for ya heading your way answer !

Mr. polanski likes the cost of an hmo plan available in his area, but would like to be able to visit one or two doctors who aren't participating providers. he wants to know if the point of service (pos) option available with some hmos will be of any in this situation. what should you tell him? mr. polanski likes the cost of an hmo plan available in his area, but would like to be able to visit one or two doctors who aren't participating providers. he wants to know if the point of service (pos) option available with some hmos will be of any in this situation. what should you tell him?

The average act score follows a normal distribution, with a mean of μ = 21.1 and a standard deviation of σ = 5.1. what is the probability that the mean iq score of 50 randomly selected people will be more than 23? 0 1 0.9958 0.3547 0.0042