Answer:
18 employees
Step-by-step explanation:
Set them up as fractions:

Cross multiply:

Simplify and solve for x:

Hope it helps! (:
Let, the missing number = x
Then, 103 + 99 + 90 + 86 + 105 + 96 + x / 7 = 95
579+x = 665
x = 665 - 579
x = 86
In short, Your Answer would be 86
Hope this helps!
A) See the attached graph. The purple area appears to be what you want to find.
b) Integrating with respect to x seems much easier. If one were to integrate over y, there would need to be two regions of integration: [1, e^2] and [e^2, e^4].
c)
Y=6, X=72
Y=?,X=8
12Y=X
12Y/9=X/9
4/3Y=8
Y=8*3/4
Y=6