Answer:
It is negative 1.
-1/1
Give me brainliest please!!
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
Since it is 4 feet, and there are 4 sides on a square, you multiply
4 feet by 4 to get a perimeter of 16 feet.
Hope this helps and have a nice day:)
2X+2+4=8
2X+6=8
-6 -6
_________
2X=2
_____
2 2
X=1
Since Boris use m minutes
Since he pays a monthly fee of 22 dollars (fixed amount)
Since the cost of each minute