The value of a scientific variable a) can change
b) cannot be measured
c) always remains the same
d) only can be found using math

Aproduction line at v. j. sugumaran's machine shop has three stations. the first station can process a unit in 7 minutes. the second station has two identical machines, each of which can process a unit in 16 minutes (each unit only needs to be processed on one of the two machines). the third station can process a unit in 10 minutes. ▼ is the bottleneck station, with a bottleneck time of nothing minutes per unit (enter your response as a whole number).

Aphase diagram assumes is kept constant.

What is part of a line has one endpoint and continues in one direction?