I dont get it plz help
2 answers:
Answer:
(D) 440 in²
Step-by-step explanation:
We can find the surface area of this complex shape by breaking it down into two smaller shapes:
The base (with side lengths of 10, 10 and 2) and the top (with side lengths of 5, 5, and 8.)
Let's first find the surface area of the base.
The sides of the bass are in², since there are 4 of these sides, the total side area here is
in².
The bottom of this prism has side lengths of 10 and 10, so .
There are two of these sides.
.
Let's add up the side lengths and the base lengths.
We aren't done yet - if we see, the top part is taking away some of that surface area. To find how much it is taking away, we need to find the area of that side.
Note that the side on the base is the exact same as the top, who's side lengths are 5 and 5. So in² are being taken away from the base, making it
Now let's find the surface area of the top.
The side, with lengths of 5 and 8, have a surface area of in². Since there are 4 of these sides:
in².
Now, the top of the box has side lengths of 5 and 5, so the surface area of that is in².
We don't want to find the area of the bottom of the top prism because that cuts into the base and technically is empty space = no surface area.
Let's add the top and the sides of the top box: in².
Finally, let's add the base and the top box surface areas together:
So the total surface area of this design is 440 in².
Hope this helped (oh my god this took so long to write)
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Answer:
a) The 99% confidence interval would be given (0.204;0.296).
b) We have 99% of confidence that the true population proportion of all seafood sold in the country that is mislabeled or misidentified is between (0.204;0.296).
c) No that's not true. Because the necessary assumptions and conditions for the confidence interval for the proportion are satisifed, so then we can use inferential statistics to interpret the interval to the population of interest.
Step-by-step explanation:
Part a
Data given and notation
n=580 represent the random sample taken
X represent the seafood sold in the country that is mislabeled or misidentified by the people
estimated proportion of seafood sold in the country that is mislabeled or misidentified by the people
represent the significance level (no given, but is assumed)
p= population proportion of seafood sold in the country that is mislabeled or misidentified by the people
A confidence interval is "a range of values that’s likely to include a population value with a certain degree of confidence. It is often expressed a % whereby a population means lies between an upper and lower interval".
The margin of error is the range of values below and above the sample statistic in a confidence interval.
Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".
The population proportion have the following distribution
The confidence interval would be given by this formula
For the 99% confidence interval the value of and
, with that value we can find the quantile required for the interval in the normal standard distribution.
And replacing into the confidence interval formula we got:
And the 99% confidence interval would be given (0.204;0.296).
Part b
We have 99% of confidence that the true population proportion of all seafood sold in the country that is mislabeled or misidentified is between (0.204;0.296).
Part c
A government spokesperson claimed that the sample size was too small, relative to the billions of pieces of seafood sold each year, to generalize. Is this criticism valid?
No that's not true. Because the necessary assumptions and conditions for the confidence interval for the proportion are satisifed, so then we can use inferential statistics to interpret the interval to the population of interest.
1) m=-2
2) C) y=-3/4x -6
3) D) y=2/5x-2
I don't understand 4 nor 5. My apologies.
6) Parallel
