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Alex
3 years ago
13

A survey concluded that 60% of cars going through the Lomonosov street encounters traffic jam. After installing a new traffic li

ghts, a random sample of 2500 cars was found to contain 1462 cars encountered traffic jam. Have the new installed traffic lights had any effect? State your conclusion with 0.05 level of significance
Mathematics
2 answers:
Mkey [24]3 years ago
6 0

Yes, the new traffic lights have had an effect, as only 58.48% of surveyed cars had encountered a traffic jam, compared to 60% before the installation of the traffic lights.

erastovalidia [21]3 years ago
3 0

Answer:

Close encounters. AI can help city officials manage traffic by counting how many moving vehicles travel down a road and identifying close encounters between vehicles and pedestrians. Courtesy TACC.

Step-by-step explanation:

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a carpet is laid on a rectangular floor which measures 4meters by 5meters. if the carpet covers 60% of the floor find the area o
Yuri [45]

Answer:

12 m²

Step-by-step explanation:

Area of the floor:

area = length * width

area = 4 m * 5 m

area = 20 m²

area of carpet = 60% of area of the floor

area of carpet = 0.6 * 20 m²

area of carpet = 12 m²

3 0
3 years ago
What Is the answer to 10ac-x/11=-3
cestrela7 [59]
  1. Multiplty both sides by 11. 11 times 11 cancels out, 11 times -3 equals -33. You should get 10ac - x = -33
  2. Add  x  to both sides:   10 a c = x − 33
  3. Divide both sides by  10 c :   a = x − 33 /10c

revised tada!

4 0
4 years ago
Please help me solve this problem
Diano4ka-milaya [45]

Answer:

20 feet

Step-by-step explanation:

48 inches is equivalent to 2 feet

so basically 10 x 2 gets you 20 feet

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3 years ago
Drag and drop each pair of lines into the correct category to indicate whether the pair of lines are parallel, perpendicular, or
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Answer:

Step-by-step explanation:

<em>(1).</em> \frac{1}{7} x + y = 9 and y = - 7x <em>( Neither )</em> ; lines intersect.

<em>(2).</em> y = 3x - 3; 12x - 4y = 12 <em>( Neither ) </em>; Lines are overlapped or both equation are of the same line.

<em>(3).</em> 7y = 2x + 1; 14x + 4y = 12 <em>( Perpendicular )</em> ; m_{1} = \frac{2}{7} and m_{2} = - \frac{7}{2} , slopes are opposite reciprocals.

<em>(4).</em> x - 4y = 18; y = x + 4 <em>( Neither )</em> ; lines intersect.

<em>(5).</em> 3x - 4y = - 1; 3y = - 4x + 5 <em>( Perpendicular )</em> ; m_{1} = \frac{3}{4} and m_{2} = - \frac{4}{3} , slopes are opposite reciprocals.

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2 years ago
Meghan is attending a college where tuition is $6,600 per year. She received a $2,000 grant and her parents will give her anothe
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