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tino4ka555 [31]
2 years ago
7

How do i find the area of a cone when all i get is radius and theta? radius = 5 theta = 52°

Mathematics
1 answer:
marishachu [46]2 years ago
4 0

Answer:

11.34464...

Step-by-step explanation:

it is not a 3-dimensional cone, it is a 2-dimensional segment of a circle. and you need to find its area.

which is also why you are asked to find the area, because for a 3-dimensional object you would have been asked about the volume of the surface.

now, about a circle and its segments.

you know how to get the area of a circle ?

it is pi×r²

that is for the full circle.

you know how many degrees it is to go "full circle" ?

360 degrees.

so, here we have only a segment of 52 degrees out of the full 360 degrees.

in other words we are dealing with 52/360 = 13/90 of the full circle.

all we have to do is therefore multiply the area of the full circle with that fraction, and we have our result.

pi×r²×13/90 = pi×5²×13/90 = pi×5×13/18 = 11.34464...

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A study of voting chose 663 registered voters at random shortly after an election. Of these, 72% said they had voted in the elec
Bingel [31]

Answer:

c) 72% is a statistic and 56% is a parameter.

Step-by-step explanation:

Previous concepts

A statistic or sample statistic "is any quantity computed from values in a sample", for example the sample mean, sample proportion and standard deviation

A parameter is "any numerical quantity that characterizes a given population or some aspect of it".

Solution to the problem

For this case we know that they select a sample of 663 registered voters and the sample proportion from these registered voters is:

\hat p = 0.72 representing the sample proportion of people who voted in the election

They info that they have is that the true proportion before is p =0.52 and that represent a value related to the population.

So on this case the 0.72 represent a statistic since represent the sample and the 0.52 is a value who represent the population for this case is a parameter.

So the correct option is:

c) 72% is a statistic and 56% is a parameter.

8 0
2 years ago
Please help me and explain
Svet_ta [14]
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3 years ago
Nadia wants to buy DVDs online for $14.99 each. The company also charges $9.50 for shipping
Valentin [98]

Answer:

C

Step-by-step explanation:

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Gennadij [26K]

Answer:

D

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3 years ago
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