A square city block has a side length of 563 yards what is the perimeter of the block Block
1 answer:
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Standard deviation(σ
) = √V(X) = 10
Therefore, variance of X. V(X) = 10² = 100
Variance of aX is given by,
V(aX) = a²V(X)
Therefore, variance of 3X will be,
V(3X) = 3²V(X) = 9(100) = 900
Therefore, standard deviation of 3X is,
σ
= √V(3X) = √900 = 30
Therefore, variance of X. V(X) = 10² = 100
Variance of aX is given by,
V(aX) = a²V(X)
Therefore, variance of 3X will be,
V(3X) = 3²V(X) = 9(100) = 900
Therefore, standard deviation of 3X is,
σ
Answer:
The extreme acceptable sizes for the center thickness of a Tootsie Roll are
x = 7.7 cm and x = 7.3 cm
Step-by-step explanation:
We are given the target thickness as 7.5 cm and the maximum variation as ±0.2
Therefore, the absolute value for the thickness of Tootsie Roll Pop is given for a thickness, x as follows;
Therefore,
x - 7.5 = 0.2 or x - 7.5 = -0.2
x = 7.5 + 0.2 = 7.7 x = 7.5 + (-0.2) = 7.5 - 0.2
x = 7.7 cm x = 7.3 cm
Therefore, the extreme acceptable sizes for the center thickness of a Tootsie Roll are
x = 7.7 cm and x = 7.3 cm