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stellarik [79]
2 years ago
14

Several years​ ago, 39​% of parents who had children in grades​ K-12 were satisfied with the quality of education the students r

eceive. A recent poll asked 1,045 parents who have children in grades​ K-12 if they were satisfied with the quality of education the students receive. Of the 1,045 ​surveyed, 471 indicated that they were satisfied. Construct a 99​% confidence interval to assess whether this represents evidence that​ parents' attitudes toward the quality of education have changed.
Mathematics
1 answer:
Mkey [24]2 years ago
6 0

Answer:

let p be the population proportion of parents who had children in grades k-12 were satisfied with the quality of education the students receive.

Step-by-step explanation:

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D is correct. f(-2) the number in the bracket is an input so..
whenever you see an X in the function replace it with -2
f(-2)=2*3^-2
3^-2 is 1/9
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so D is correct
5 0
3 years ago
Read 2 more answers
What is the width of a rectangle with an area of 5/8 inches and the length of 10 inches?
Nimfa-mama [501]
A = LW......W = A/L
A = 5/8
L = 10

W = (5/8) / 10
W = 5/8 * 1/10
W = 5/80 = 1/16


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3 years ago
HELP PLEASE! Write a quadratic function that passes through the point (-1,9), has an axis of symmetry of x=-3 and a minimum valu
xxTIMURxx [149]

Answer:

y = \frac{1}{2}x^{2} - 3x + 11.5

Step-by-step explanation:

Vertex form of a quadratic equation;

y = a( x - h )^{2} + k

Vertex of the parabolas (h, k)

The vertex of the parabola is either the minimum or maximum of the parabola. The axis of symmetry goes through the x-coordinate of the vertex, hence h = -3. The minimum of the parabola is the y-coordinate of the vertex, so k= 7. Now substitute it into the formula;

y = a ( x + 3 ) ^{2} + 7

Now substitute in the given point; ( -1, 9) and solve for a;

9 = a( (-1 ) + 3)^2 + 7\\9 = a (2)^{2} + 7\\9 = 4a + 7\\-7           -7\\2 = 4a\\\frac{1}{2} = a\\

Hence the equation in vertex form is;

y = \frac{1}{2}(x - 3)^{2} + 7

In standard form it is;

y = \frac{1}{2}x^{2} - 3x + 11.5

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2 years ago
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Answer:

Step-by-step explanation:

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2 years ago
Find the area of cross section,the lateral surface area,the total surface area and volume of the following prisms.​
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Answer:

don't

Step-by-step explanation:

please send me only

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2 years ago
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