Which of the following situations best models the materials needed to build the fence for the warehouse lot shown in the general contractor’s design? the general contractor should purchase enough materials for approximately 3,000 linear feet of fencing. the general contractor should purchase enough materials for approximately 3,300 linear feet of fencing. the general contractor should purchase enough materials for 615,636 linear feet of fencing. none of the above.

a)  z (score) 1,53

b)  z ( score) - 1,96

c) 200 students

Step-by-step explanation:

Normal Distribution N ( 74;10)

a) From z-table, and for 6,3 %  ( 0,063 ) we find the z (score) 1,53

Note : 6,3 % or 0,063 is the area under the curve, the minimum score neded to get A

b) To fail   2,5 %  ( 0,025 ) from z-table  get - 1,96

c) If the group of  student who did not pass the course (5) correspond to 2,5 % then by simple rule of three

5                 2,5

x ?               100

x = 500/2,5

x = 200