The answer is A all three angles are acute (less than 90°)
Answer:


And the best option would be:
D. (0.191 to 0.249)
Step-by-step explanation:
For this case we know that the mean is:

And the standard error is given by:

We want to construct a 68% confidence interval so then the significance level would be :
and
. The confidence interval is given by:

Now we can find the critical value using the normal standard distribution and we got looking for a quantile who accumulate 0.16 of the area on each tail and we got:

And replacing we got:


And the best option would be:
D. (0.191 to 0.249)
Hello,
Answer D
y=2x/7+4
x=2y/7+4
(x-4)*7/2=y
put the first equation in the graphic calculator in y= #1 then in y=#2 put one of the answer choices, if the y1 & y2 match that will be your answer
Answer:
your answer will be <u>0</u>
Step-by-step explanation:

axis of symmetry
when b=0

hope it helps :)
have a nice weekend!!!