What are the zeros of this function? g(x) = 2(x + 2)(x − 9)

Where are the zeros of the function g located?

I don't understand this, can someone help pls?

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%