Will someone answer this asap? note: answer must not be a fraction or decimal

Plz me plz i will give a brain just plz

Issof claims that the scale factor is 1/2. which statement about his claim is correct

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%