If the radius of the circle is 9 cm, what is the area of sector AOB

Mathematics

1 answer:

cupoosta [38]3 years ago

3 0

254.47 you can google this kid just search formula for the area of a circle. Or A=pie*r^2

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Identify the conclusion in a hypothesis test of the following claim and sample data:

Anarel [89]

Answer:

Step-by-step explanation:

Firstly, we set up the null and alternative hypothesis as follows;

The null hypothesis is;

H0: μ ≥ 12

The alternative hypothesis is;

Ha : μ < 12

Next step is to calculate the test statistic z

Mathematically;

z = (x - μ )/ σ /√n

= (11.58 - 12) /1.93/√(80

Test statistic z = -1.92

Now we proceed to find the probability value that is equal to the value of the test statistic. We can find this by using the standard normal table or NORMSTD function on excel

P(z < -1.92) = 0.0274

P-value = 0.0274

alpha = 0.05

From the above, we can see that

P-value < alpha

And because of this, we are going to reject the null hypothesis and therefore accept the alternative.

We then conclude that there is sufficient evidence to conclude that "The average battery life (between charges) of this model of tablet is at least 12 hours."

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3 years ago

A man that is 6 feet tall weighs 165 pounds. Use this information to predict the weight of a man that is 5

Zarrin [17]

Answer:

151 pounds

Step-by-step explanation:

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3 years ago

At what value of x does the minimum or maximum occur for the function below? f(x) = 8(x + 8)2 + 9 A. maximum at x = 9 B. minimum

WINSTONCH [101]

$8 {(x + 8)}^{2} + 9 \geqslant 9 \: ( {(x + 8)}^{2} \geqslant 0) \\ \Leftrightarrow x + 8 = 0\Leftrightarrow x = - 8 \\ \Rightarrow D.\: Minimum\: at\: x=-8$