Determine the measure of angle ECB. Question 9 options:
1) 91.75°
2) 183.5°
3) 176.5°
4) 88.25°

Astandard american eskimo dog has a mean weight of 30 pounds with a standard deviation of 2 pounds. assuming the weights of standard eskimo dogs are normally distributed, what range of weights would 99.7% of the dogs have? approximately 26–34 pounds approximately 24–36 pounds approximately 28–32 pounds approximately 29–31 pounds

How do i do this? i don’t understand

If value of cos330° is √3/2 then find tan165°.