In triangle fe = 5 and angle d=43 . find de to the nearest tenth

What properties allow transformation to be used as a problem solving tool

Ineed with math stuff it involves graphs

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%