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Goryan [66]
2 years ago
5

At an intersection, the red light times are normally distributed with a mean time of 3 minutes and a standard deviation of 0.25

minutes. Approximately what percent of red lights last between 2.5 and 3.5 minutes? (2 points)
Mathematics
1 answer:
VladimirAG [237]2 years ago
3 0

Answer:

95.4%

Step-by-step explanation:

Z(low)=-2 0.022750132

Z(upper)=2 0.977249868

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3 years ago
A construction worker is looking at blueprints drawn to a 1/20 scale and notices that a wall is 0.5 feet by 0.25 feet. He claims
Gnoma [55]

Answer:

incorrect

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we are finding area which is squared, or we can put it in an equation, (0.5*20)*(0.25*20) or 0.5*0.25*20^2 which equals 50      but (0.5*0.25)*20 only equals 2.5    therefor he is incorrect and the correct answer would be 20^2 or 400 times the area.

hope this helps :)

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3 years ago
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Hope this helps!
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3 years ago
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