Answer:
0.969
Step-by-step explanation:
Given that:
Mean lifetime (m) = 520 hours
Variance = 900
Hence, standard deviation (s) = √900 = 30
Probability that bulb will last for at most 576 hours
X ≤ 576
Obtain the standardized score :
Using the relation :
Zscore = (x - m) / s
Zscore = (576 - 520) / 30
Zscore = 56 / 30
Zscore = 1.867
P(Z ≤ 1.867) : using the z probability calculator ;
P(Z ≤ 1.867) = 0.96905
Hence, P(Z ≤ 1.867) = 0.969
Answer:
36995.1474
Step-by-step explanation:
multiply the area value by 2.471
Answer:
I believe it would cost 9 cents per cubic foot of gas.
Step-by-step explanation:
Answer:
1/2
Step-by-step explanation:
Answer:
A
C
i don't get the first slide
Step-by-step explanation: