Answer:
40mph
Step-by-step explanation:
(60mph+20mph)/2
40
I believe the correct answer should be the second option. This makes the most sense given the coordinates.
If this helped you, please list me as brainliest!
Answer:
-4h + 8 + 9h - 1 + 3h - 7= 8h
Step-by-step explanation:
Answer:
A sample size of 35 is needed.
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 width W as such

In which
is the standard deviation of the population and n is the size of the sample.
How large must the sample size be if the width of the 95% interval for mu is to be 1.0:
We need to find n for which W = 1.
We have that
, then
. So





Rounding up
A sample size of 35 is needed.