Answer:
0.16
Step-by-step explanation:
Given that the length of time Y necessary to complete a key operation in the construction of houses has an exponential distribution with mean 18 hours.
The formula for cost of completing this operation is

C has mean 3124
Var(C) = 28,460,160
Std dev (C) = 
X = 4000 hours
Difference = 
Mean diff/std dev = 
i.e.nearly 0.16 standard deviations above the mean is 4,000 hours
A possible answer could be 9
Answer:
6
Step-by-step explanation:
3 quarts=6 pints
C=2pir
first one is r=70
c=2pi70=140pi
2nd one is 49=r
c=2pir
c=2pi49
c=98pi
ratio is
140pi:98pi=10:7