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?

15.87%

Step-by-step explanation:

We have been given that 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.

Let us find the z-score of 12, using z-score formula.

, where,

= z-score,

= Random sample score,

= Mean,

= Standard deviation.

Upon substituting our given values in z-score formula we will get,

Let us find P(z<-1) using normal distribution table.

Therefore, probability of a temporary worker earns less than $12 per hour is 0.15866. Let us convert our given probability in percentage by multiplying by 100.

Therefore, 15.87% of temporary workers earn less than $12 per hour.

B. 16%

Step-by-step explanation: I got this right on Edmentum

for finding the midpoint of any given 2 pair of points simply add the respective x coordinates with other x coordinate and the y coordinate with other y coordinate and divide them by 2

in your question it will be :

(3+1)/2 for the x coordinate of mid point i.e 2

[8+(-4)]/2 for the y coordinate of midpoint i.e 2

so coordinates of mid point of points (3,8) and (1,-4) will be (2,2)

the answer to your question is c.)   volcanoes built the mountains and earthquakes tore them down.

step-by-step explanation: