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uranmaximum [27]
4 years ago
15

I need help with this question please

Mathematics
1 answer:
galina1969 [7]4 years ago
3 0

Answer:

4 cm.

Step-by-step explanation:

The area of a circle can be calculated via the formula πr². Working backwards, we can divide by π and take the square root, to find that the radius of the circle is 4 cm.

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(-3,4) m= -3 how would you solve this problem
nignag [31]

you would do PEMDAS

you do -3 times 4. then you do that and devide by -3.

5 0
3 years ago
Y=-5. How can I graph this?
tankabanditka [31]
Y=-5 would be a horizontal line going through -5
4 0
3 years ago
Determine the vertex of the function f(x) = 2(x - 5)2 + 8.
Pachacha [2.7K]
Solve for x, which can be done by moving x to the other side.
2(x-5)^2+8

So, x = 5

The y value is the number at the end and we can see that it is positive 8.

y = 8

Write it out as a coordinate pair and you would get (5,8) or answer choice D
8 0
4 years ago
Construct a 95% confidence interval for the population mean, µ. Assume the population has a normal distribution. A sample of 25
Alex787 [66]

Answer:

Step-by-step explanation:

We want to determine a 95% confidence interval for the mean mean test score of students.

Number of sample, n = 25

Mean, u = 81.5

Standard deviation, s = 10.2

For a confidence level of 95%, the corresponding z value is 1.96. This is determined from the normal distribution table.

We will apply the formula

Confidence interval

= mean ± z score ×standard deviation/√n

It becomes

81.5 ± 1.96 × 10.2/√25

= 81.5 ± 1.96/× 2.04

= 81.5 ± 3.9984

The lower end of the confidence interval is 81.5 - 3.9984 =77.5

The upper end of the confidence interval is 81.5 + 3.9984 = 85.5

Therefore, with 95% confidence interval, the mean test score of students is between 77.5 and 85.5

5 0
3 years ago
<img src="https://tex.z-dn.net/?f=%28-2a%5E%7B4%7Db%5E%7B2%7D%29%5E3" id="TexFormula1" title="(-2a^{4}b^{2})^3" alt="(-2a^{4}b^{
FinnZ [79.3K]

Answer:

-8a^12b^6

Step-by-step explanation:

multiply each term with the power

4 0
3 years ago
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