Answer:
Unclear
Step-by-step explanation:
I believe we need more information to solve the problem!
We currently have:
a = b
b = total amount for 40 hours
As you can see, we cannot solve this. For a we would need something like how much you make per week, etc!
180=90+50+x
180=140+x
x=180-140=40
X=40
Answer:
hi
Step-by-step explanation:
a) 
because it is equal to the area of the shaded region between X=4 and X=6, and the probability that X falls within some interval is given by the area under the PDF.
b) 
because the shaded region is a rectangle of height 1/5 (by virtue of X following a uniform distribution over the interval [2, 7], which has length 5).
