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4 years ago

HELP i have three questions can anyone help this is a exam please hurry and answer with a,b, c, or d.

Mathematics

2 answers:

k0ka [10]4 years ago

8 0

Answer:

Step-by-step explanation:

kenny6666 [7]4 years ago

3 0

The answer is a, they are vertical angles and vertical angles are congruent

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Which value of x makes the open sentence true? 10 +m2x< 15x-20? 0, 1, 2,3

Zielflug [23.3K]

x=3 if the m was a typo, idk what that means

3 0

3 years ago

According to the 2011 National Survey of Fishing, Hunting, and Wildlife-Associated Recreation, there were over 71 million wildif

suter [353]

Answer:

The probability that between 79% and 81%of the 500 sampled wildlife watchers actively observed mammals in 2011 is P=0.412.

Step-by-step explanation:

We know the population proportion π=0.8, according to the 2011 National Survey of Fishing, Hunting, and Wildlife-Associated Recreation.

If we take a sample from this population, and assuming the proportion is correct, it is expected that the sample's proportion to be equal to the population's proportion.

The standard deviation of the sample is equal to:

$\sigma_s=\sqrt{\frac{\pi(1-\pi)}{N}}=\sqrt{\frac{0.8*0.2}{500}}=0.018$

With the mean and the standard deviaion of the sample, we can calculate the z-value for 0.79 and 0.81:

$z=\frac{p-\pi}{\sigma}=\frac{0.79-0.80}{0.018} =\frac{-0.01}{0.018} = -0.55\\\\z=\frac{p-\pi}{\sigma}=\frac{0.81-0.80}{0.018} =\frac{0.01}{0.018} = 0.55$

Then, the probability that between 79% and 81%of the 500 sampled wildlife watchers actively observed mammals in 2011 is:

$P(0.79$

3 0

3 years ago

A graph is shown below:

pshichka [43]

If one of the points is (0,36), then that shows that, that is the number where the line crosses the y-axis, so now all you have to do is plug in 36 to b in the y=mx+b formula. So the answer is B

6 0

3 years ago

The product of negative six and the sum of q plus two is twenty.

Verdich [7]

Answer:

q=24

Step-by-step explanation:

The 20 plus the 4 to make it 24 is the entire problem.

4 0

3 years ago

a cone has a diameter of 3 inches. The come holds 12 cubic inches of water. To the nearest inch, what is the height of the cone?

Shkiper50 [21]

Volume for a cone is 1/3 pi * r^2*h, where r is radius and h is height. We have diameter = 1/2 radius. Thus, radius = 1.5in. We also have volume is 12 in. Using formula for volume of a cone and plugging in what we know, we have 12 = 1/3*pi*(1.5)^2*h, were solving for h. To get, h= (12*3)/(pi*(1.5)^2), which is approximately 5.0931in, 5 inches

7 0

3 years ago