Someone help me asap

If the value of cos330°is√3/2 then find cos 165°.

In a certain city, the hourly wage of workers on temporary employment contracts is normally distributed. the mean is $15 and the standard deviation is $3. what percentage of temporary workers earn less than $12 per hour? a. 6% b. 16% c. 26% d. 36%

The distance between two points is 6.5cm and scale of map is 1: 1000 what's the distance between the two points