Answer:
Change in productivity will be 50%
So option (b) will be correct option
Step-by-step explanation:
It is given that it takes 8 hour to bake 800 pretzels
And there is a shift of 8 hours
So hourly production = 
Now the production is increases to 1200
Now hourly production = 
So change in productivity =
%
So option (b) will be correct answer
Answer:
4.4
Step-by-step explanation:
The mean is the sum of the data divided by the number of data values. so add them all together and then divide by how many numbers you added together.
Here is an example 1,3,4,5,7 so add 1+3+4+5+7=20 then you divide 20 by 5 and the mean is 4 for this example.
|2x + y - 3z|
Plug in the values
|-4 + 10 - 9|
= |-3|
= 3