You may have heard terms like "dependency" or "logical relationship" when referring to sequencing activities. PMI tends to use the term dependency, and personally, I prefer it too because it accurately describes what you're trying to model. Something is dependent on something else before work can move forward.

There are many types of dependencies, and they can be categorized as either:
mandatory or discretionary
and
either external or internal.

yo

step-by-step explanation:

yo

(b) 240

step-by-step explanation:

first, we use the pythagorean formula using the given side lengths to find x. then we use x to find the side lengths. then we add the side lengths to find the perimeter.

pythagorean theorem formula:

a^2 + b^2 = c^2

(x - 20)^2 + (x - 40)^2 = x^2

x^2 - 40x + 400 + x^2 - 80x + 1600 = x^2

x^2 -120x + 2000 = 0

(x - 100)(x - 20) = 0

x - 100 = 0 or x - 20 = 0

x = 100 or x = 20

we see that the solution x = 20 must be discarded because it will give a negative side length and a side length of 0. the only valid solution is x = 100.

perimeter = sum of the lengths of the sides

perimeter = x + x - 20 + x - 40

perimeter = 3x - 60

replace x with 100.

perimeter = 3(100) - 60

perimeter = 300 - 60

perimeter = 240

its the second choice.

step-by-step explanation:

the elements in the range will be 7 less than the elements in the domain.