You start at (7,0). You move up 1 unit.
2 answers:
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Answer: The margin of error = 3.71, confidence interval = (354.04, 361.46) and it means that mean cost is lies within the confidence interval.
Step-by-step explanation:
Since we have given that
Sample size = 400
Mean = $357.75
Standard deviation = $37.89
At 95% confidence level, z = 1.96
We first find the margin of error.
Margin of error is given by
95% confidence interval would be
Hence, the margin of error = 3.71, confidence interval = (354.04, 361.46) and it means that mean cost is lies within the confidence interval.
Given:
In rhombus RSTU, and
.
To find:
The .
Solution:
We know that, diagonals of a rhombus are angle bisector. So,
Isolating variable terms, we get
Divide both sides by 7.
Now,
And,
.
Now,
We know that opposite angles of a rhombus are equal.
Therefore, the measure of angle RST is .