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poizon [28]
2 years ago
12

A quadratic function is increasing on the interval x>4 and decreasing on the interval x<4. It has a minimum value of 1 and

passes through the point (2,11). Determine the equation for this parabola
Mathematics
1 answer:
statuscvo [17]2 years ago
5 0
O si la verdad esa la multiplicas por cada forma
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What is the common difference in the sequence 5, 10, 15, 20, 25,...?
Bas_tet [7]
The answer is D

You just need to subtract term 1 (5) from term 2 (10) to find the answer, and the common difference between each sequential term is 5
8 0
3 years ago
It is known that the population variance equals 484. With a .95 probability, the sample size that needs to be taken if the desir
Ksju [112]

Answer:

We need a sample size of at least 75.

Step-by-step explanation:

We have that to find our \alpha level, that is the subtraction of 1 by the confidence interval divided by 2. So:

\alpha = \frac{1-0.95}{2} = 0.025

Now, we have to find z in the Ztable as such z has a pvalue of 1-\alpha.

So it is z with a pvalue of 1-0.025 = 0.975, so z = 1.96

Now, we find the margin of error M as such

M = z*\frac{\sigma}{\sqrt{n}}

In which \sigma is the standard deviation of the population and n is the size of the sample.

The standard deviation is the square root of the variance. So:

\sigma = \sqrt{484} = 22

With a .95 probability, the sample size that needs to be taken if the desired margin of error is 5 or less is

We need a sample size of at least n, in which n is found when M = 5. So

M = z*\frac{\sigma}{\sqrt{n}}

5 = 1.96*\frac{22}{\sqrt{n}}

5\sqrt{n} = 43.12

\sqrt{n} = \frac{43.12}{5}

\sqrt{n} = 8.624

(\sqrt{n})^{2} = (8.624)^{2}

n = 74.4

We need a sample size of at least 75.

6 0
3 years ago
Read 2 more answers
9 is the Greatest Common Factor of what 2 numbers?
Tresset [83]

Answer: The answer would be 3 & 1

7 0
3 years ago
Can someone please help me?
12345 [234]

Answer:

24 square inches

Step-by-step explanation:

First box: 3 x 4 = 12

Second box: 3 x 4 = 12

Added together = 24

7 0
3 years ago
Read 2 more answers
If anyone can please help me
MA_775_DIABLO [31]

Answer:

1/4

Step-by-step explanation:

5 orange + 5 mango = 10

P( mango ) = mango /total = 5/10 = 1/2

Replace

5 orange + 5 mango = 10

P(orange ) = orange /total = 5/10 = 1/2

P(mange, replace, orange) = 1/2 * 1/2 = 1/4

4 0
3 years ago
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