31 its easy just count the squares. Each half count to to equal one square.
Answer:
cant you only get brainliest by answering a lot of questions?
Step-by-step explanation:
<h2>=√(-8-(-6))^+(-4-1)^</h2><h2>=√(-2)^+(-5)^</h2><h2>= -2-5</h2><h2>= -7</h2>
Answer:
$628.67
Step-by-step explanation:
15% of her restaurant bill is $94.30.
15 goes into 100, 6 2/3 times. so we multiply both 15% and $94.30 by 6 2/3 to get 100% and the restaurant bill.
15% x 6 2/3 = 100%
$94.30 x 6 2/3 =
628.666666
or
$628.67
I hope that this helps! :)
Answer:
The 80% confidence interval for the mean number of words a third grader can read per minute is between 40.4 wpm and 40.8 wpm.
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 40.6 - 0.2 = 40.4 words per minute.
The upper end of the interval is the sample mean added to M. So it is 40.6 + 0.2 = 40.8 words per minute.
The 80% confidence interval for the mean number of words a third grader can read per minute is between 40.4 wpm and 40.8 wpm.