Cos (90-34)°=sin (34°) So Cos (56°)=Sin(34°)
True
-1, -2, -4, -8, ... is the non-arithmetic sequence. It’s geometric as there’s a common ratio of 2.
<em>Answer</em><em>:</em>
<em>$</em><em>2</em><em>0</em><em>.</em><em>5</em><em>5</em>
<em>Explanation</em><em>:</em>
- 1apple pie needs 2/3/4pounds of apple
- 1pound cost $2.49
- 2/3/4 = ?
- 2/3/4 ×2.49
- =$6.85 for one pie
- For 3 pies ,
- =$6.85×3
- = $20.55
Answer:
y=1/2x+2
Step-by-step explanation:
Answer:
The 80% confidence interval for the mean per capita income in thousands of dollars is between $20.8 and $21.4.
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 M as such
In which is the standard deviation of the population and n is the size of the sample.
The lower end of the interval is the sample mean subtracted by M. So it is 21.1 - 0.3 = $20.8.
The upper end of the interval is the sample mean added to M. So it is 21.1 + 0.3 = $21.4.
The 80% confidence interval for the mean per capita income in thousands of dollars is between $20.8 and $21.4.