Answer:

Step-by-step explanation:
PL^2 =7^2 +3^2
PL^2=49+9
PL=

Answer:
The sample size is too small
Step-by-step explanation:
The answer is the last one: the sample size is too small. Since we only got 3 subjects to test, maybe one of them could live for a long time after the diagnosis of Cacer and that made the average survival time go up by a lot.
In order to obtain results with a significance level higher, you need a sample size of at least 20 subjects.
Now lets see why other options wouldnt be good answers:
- For a small amount of subjects, it is unlikely to have errors in caculation
- The sample size is given
- We are not given information about the treatment and we dont even know if the subjects feel more confident with the new treatment. Also, if a Placebo effect works regularly, it shouldnt limit statistical sifgnificance
- An increase in 2 years is huge in comparison with the previous survival time.
2 because they both can be divided by 2 and 4and equal a whole number
Answer:
The measure of DC is 20ft.
Step-by-step explanation:
Because the problem states that BA=AC, AD becomes the bisector of angle BAC. This means that BD and DC must be the same length.