I have another math question and another Brainliest for a math genius
2 answers:
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<h2>Answer:</h2>
Hence, the two integers could be:
3 and 9
0R
-3 and -9
<h2>Step-by-step explanation:</h2>Let the two integers be denoted by a and b.
It is given that:
One integer is 1/3 times another.
i.e. let
i.e.
Also,
The sum of their squares is 90.
i.e.
Hence, when a=3 we have:
and when,
then b=-9
Answer:
At least 98 people need to be sampled. It is not a huge number, that is, it is not difficult to sample 98 people, so it is a reasonable sample size for a real world calculation.
Step-by-step explanation:
We have that to find our level, that is the subtraction of 1 by the confidence interval divided by 2. So:
Now, we have to find z in the Ztable as such z has a pvalue of .
So it is z with a pvalue of , so
Now, find the margin of error M as such
In which is the standard deviation of the population and n is the size of the sample.
In this question:
We need a sample size of at least n.
n is found when M = 3. We have that .
Simplifying by 3
Rounding up,
At least 98 people need to be sampled. It is not a huge number, that is, it is not difficult to sample 98 people, so it is a reasonable sample size for a real world calculation.