Answer:
See picture.
Sorry about the scrawly handwriting!
Step-by-step explanation:
You can split the figure into 2 trapezoids as shown.
No. When you plug in x and y you get 2=3
Relationship 2 is a function because x isn’t being repeated.

10 to the power of 6 equals 1,000,000.
Answer:
p(on schedule) ≈ 0.7755
Step-by-step explanation:
A suitable probability calculator can show you this answer.
_____
The z-values corresponding to the build time limits are ...
z = (37.5 -45)/6.75 ≈ -1.1111
z = (54 -45)/6.75 ≈ 1.3333
You can look these up in a suitable CDF table and find the difference between the values you find. That will be about ...
0.90879 -0.13326 = 0.77553
The probability assembly will stay on schedule is about 78%.