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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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The general solution of <span>y' + 2xy = (x^3) is y(x) = c1e^(-x^2)

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The general solution of<span> (dP)/(dt) + 2tP = P + 4t - 2 is P(t) = c1e^(t - t^2) + 2</span>
4 0
3 years ago
Write an algebraic equation to solve for the triangle’s height. Area of the triangle =36.8 inches . Height is x and base is 4.6
Minchanka [31]
The formula to find the Height of a triangle when you have the Area and the base is H = 2 * A/b
if the Area is 36.8 then divide it by 4.6.  You get 8.  put 36.8 in calculator first, then 4.6 = 8
2 x 8 = 16...so the answer should be 16 inches.
2 is in the formula to multiply to the number you get after dividing the base into the Area.
16 Answer
3 0
3 years ago
If 8 measures 119 what is the sum 1 and 4
kompoz [17]
7l5     3l1
8l6     4l2
 Parallel 

8 0
3 years ago
Elena starts her new job working at an office supply store. She works for 6 hours and makes a total of $54.
docker41 [41]

Answer:

<u>I </u><em><u>believe </u></em><u>the answer would be A.</u>

Step-by-step explanation:

A says 6 x h is 54.

            ^    ^      ^

            important!

6 is the number of hours.

h is how much money made per hour.

54 is the total after working 6 hours.

4 0
3 years ago
F s(x) = 2 – x2 and t(x) = 3x, which value is equivalent to (s*t)(-7)
Natalija [7]
S(x) = 2 - x²

t(x) = 3x

s(t(x)) = st(x)

s(t(x)) :

s(3x)

So in s(x) = 2 - x²,  to solve for s(3x) we replace x with 3x

s(x) = 2 - x²

s(3x) = 2 - (3x)²

          =  2 - 9x²

st(x) = 2 - 9x²

st(-7) = 2 - 9*(-7)(-7)

         = 2 - 9*49 = 2 - 441 = -439

st(-7) = -439
5 0
3 years ago
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